Abdul Wahab Hashmi, Harlal Singh Mali and Anoj Meena
The purpose of this paper is to study the functionality of additively manufactured (AM) parts, mainly depending on their dimensional accuracy and surface finish. However, the…
Abstract
Purpose
The purpose of this paper is to study the functionality of additively manufactured (AM) parts, mainly depending on their dimensional accuracy and surface finish. However, the products manufactured using AM usually suffer from defects like roughness or uneven surfaces. This paper discusses the various surface quality improvement techniques, including how to reduce surface defects, surface roughness and dimensional accuracy of AM parts.
Design/methodology/approach
There are many different types of popular AM methods. Unfortunately, these AM methods are susceptible to different kinds of surface defects in the product. As a result, pre- and postprocessing efforts and control of various AM process parameters are needed to improve the surface quality and reduce surface roughness.
Findings
In this paper, the various surface quality improvement methods are categorized based on the type of materials, working principles of AM and types of finishing processes. They have been divided into chemical, thermal, mechanical and hybrid-based categories.
Research limitations/implications
The review has evaluated the possibility of various surface finishing methods for enhancing the surface quality of AM parts. It has also discussed the research perspective of these methods for surface finishing of AM parts at micro- to nanolevel surface roughness and better dimensional accuracy.
Originality/value
This paper represents a comprehensive review of surface quality improvement methods for both metals and polymer-based AM parts.
Graphical abstract of surface quality improvement methods
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Yan Li, Shuangliang Tai and Zirui Tai
Green construction is increasingly vital in promoting sustainability within the construction industry. The development and promotion of green construction technologies are central…
Abstract
Purpose
Green construction is increasingly vital in promoting sustainability within the construction industry. The development and promotion of green construction technologies are central to this endeavor. However, existing evaluations mainly target building components, construction projects or certain construction processes. There is a notable absence of research into the greenness of construction technologies. Assessing the greenness of construction technologies is crucial for streamlining resource utilization and reducing waste. To address this gap, this study aims to establish a Greenness of Construction Technologies (GCT) evaluation model using the method of analytic network process (ANP).
Design/methodology/approach
Green construction is increasingly vital in promoting sustainability within the construction industry. The development and promotion of green construction technologies are central to this endeavor. However, existing evaluations mainly target building components, construction projects or certain construction processes. There is a notable absence of research into the greenness of construction technologies. Assessing the greenness of construction technologies is crucial for streamlining resource utilization and reducing waste. To address this gap, this study establishes a GCT evaluation model using the method of ANP.
Findings
Among the four formwork technologies of plastic, steel, plywood and wooden formwork, the plastic formwork exhibits the best performance in terms of environmental friendliness, economic and social effects, while facing issues like material wastage and low static strength. The results align with practical observations which validates the model’s applicability.
Originality/value
This research contributes to the field by introducing the concept of greenness into construction technology evaluation for the first time. The establishment of the GCT evaluation model promotes the adoption of green construction technologies and advances sustainable practices in the construction industry.
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C. B. Mohan, K. Venkatesh, C. Divakar, K. Gopalakrishna, L. Murali and K. G. Lakshminarayana Bhatta
The paper aims to address the formulation of zirconium and oxalicum additive-based lubricants for use in slide ways to meet the demands of high positioning exactness based on…
Abstract
Purpose
The paper aims to address the formulation of zirconium and oxalicum additive-based lubricants for use in slide ways to meet the demands of high positioning exactness based on reduction in stick–slip and coefficient of friction over a wide speed range and compares the same with commercially available lubricant.
Design/methodology/approach
An investigation into the frictional properties and stick-slip behavior of lubricating oil is carried out using linear reciprocating tribometer and correlated with ultraviolet spectroscopic analysis.
Findings
It is observed that these transition metal additive compounds support in increasing the flexibility of the molecular chains leading to improved lubricity.
Originality/value
The lubricant additives considered for the current study are based on transition metals zirconium and oxalicum. It is observed that these additive compounds support in increasing the flexibility of the molecular chains, leading to improved lubricity.
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Khushdeep Goyal, Hazoor Singh and Rakesh Bhatia
The purpose of this study was to fabricate carbon nanotubes (CNT)-reinforced chromium oxide coatings and investigate mechanical and microstructural properties of these newly…
Abstract
Purpose
The purpose of this study was to fabricate carbon nanotubes (CNT)-reinforced chromium oxide coatings and investigate mechanical and microstructural properties of these newly developed coatings on the boiler tube steel.
Design/methodology/approach
1 and 4 Wt.% CNT-reinforced Cr2O3 composite coatings were prepared and successfully deposited on ASTM-SA213-T22 (T22) boiler tube steel substrates using high-velocity oxy fuel (HVOF) thermal spraying method. Microhardness, porosity, metallography, X-ray diffraction (XRD), scanning electron microscopy (SEM)/energy-dispersive X-ray spectroscopy, cross-sectional elemental analysis and X-ray mapping analysis have been used to examine the coated specimens.
Findings
The porosity of the CNT-Cr2O3 composite coatings was found to be decreasing with the increases in CNT content, and hardness has been found to be increasing with increase in percentage of CNT in the composite coatings. The CNT were able to increase hardness by approximately 17 per cent. It was found that the CNT were uniformly distributed throughout Cr2O3 matrix. The CNT were found to be chemically inert during the spraying process.
Originality/value
It must be mentioned here that studies related to fabrication of HVOF sprayed CNT reinforced Cr2O3 composite coatings on T22 boiler tube steel are not available in the literature. Hence, present investigation can provide valuable information related to fabrication and properties of CNT reinforced coatings on boiler steel.
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Nivisha Singh, Ritesh Pandey, Rohit Gupta, Baidyanath Biswas and Shubhi Gupta
This study aims to synthesize extant literature on the concept of reverse knowledge transfer (RKT) built up over the past two decades with the help of bibliometric analyssis and…
Abstract
Purpose
This study aims to synthesize extant literature on the concept of reverse knowledge transfer (RKT) built up over the past two decades with the help of bibliometric analyssis and also to suggest promising new areas for research in this field.
Design/methodology/approach
The study adopts a literature review methodology combined with bibliometric and network analysis based on 117 papers identified from the Scopus database. In particular, this study has tried to identify and capture themes not previously fully captured or evaluated by other reviews on this topic.
Findings
The authors have identified research themes and research gaps in the area of RKT. Overall, the review shows the main outlets that have published papers on RKT and the theoretical background this research is built on. This study exhibits core themes in this area that have persisted and grown consistently such as the subsidiary’s role in RKT. In addition, the review highlights less researched themes such as role of boundary spanning in RKT, which open exciting avenues for new research opportunities.
Research limitations/implications
This study finds that RKT research has experienced remarkable growth from a complete viewpoint in recent years. There was a surge in publications in the area from 2008 onwards, and many of its influential papers seemed to have been published between 2013 and 2018. Prominent themes in this body of research have been identified and potential for future studies has been explored.
Originality/value
To the best of the authors’ knowledge, this is the first study to map, synthesize and discuss the literature concerning RKT.
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Khushdeep Goyal, Hazoor Singh and Rakesh Bhatia
Molten sulphate-vanadate induced hot corrosion is the main reason of failure of boiler tubes used at high temperatures in thermal power plants. The hot corrosion can be…
Abstract
Purpose
Molten sulphate-vanadate induced hot corrosion is the main reason of failure of boiler tubes used at high temperatures in thermal power plants. The hot corrosion can be encountered by applying thermal spray coatings on the alloy steels. In this perspective, this paper aims to attempt to investigate the effect of carbon nanotubes reinforcement on Cr2O3 composite coatings on hot corrosion behaviour of ASTM-SA213-T22 steel in a corrosive environment of Na2SO4 – 60%V2O5 at 900°C for 50 cycles.
Design/methodology/approach
The coatings have been deposited with high velocity oxy fuel process. The samples were exposed to hot corrosion in a Silicon tube furnace at 900°C for 50 cycles. The kinetics of corrosion behaviour were analysed by the weight gain measurements after each cycle. Corrosion products were analysed with X-ray diffraction, scanning electron microscopy, energy dispersive and cross-sectional analysis techniques.
Findings
During investigations, the carbon nanotubes (CNT) reinforced Cr2O3 composite coatings on T22 steel were found to provide better corrosion resistance in the molten salt environment at 900°C. The coatings showed lower weight gain along with formation of protective oxide scales during the experiment. Improvement in protection against hot corrosion was observed with increase in CNT content in the coating matrix.
Research limitations/implications
The addition of CNT has resulted in reduction in porosity by filling the voids in chromium oxide coating, with interlocking of particle and has blocked the penetration of corroding species to enhance the corrosion resistance of the composite coatings. The corrosion rate was found to be decreasing with increase in CNT content in coating matrix.
Originality/value
It must be mentioned here that high temperature corrosion behaviour of thermally sprayed CNT-Cr2O3 composite coatings has never been studied, and it is not available in the literature. Hence, present investigation can provide valuable information for application of CNT-reinforced coatings in high temperature fuel combustion environments.
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María Isabel Barba-Aragón, Raquel Sanz-Valle and María Eugenia Sanchez-Vidal
The objective of this study is to analyze the process of reverse knowledge transfer (RKT) occurring in multinational companies (MNCs), examining whether headquarters' absorptive…
Abstract
Purpose
The objective of this study is to analyze the process of reverse knowledge transfer (RKT) occurring in multinational companies (MNCs), examining whether headquarters' absorptive capacity and the human resource management (HRM) practices developed by the parent unit influence success.
Design/methodology/approach
The data were collected through a questionnaire completed by the human resource manager of multinational company (MNC) headquarters. The analysis has been carried out on a sample of 115 Spanish MNCs by using structural equation models (SEM).
Findings
The results indicate that a parent firm's absorptive capacity positively influences RKT and that, in turn, this absorptive capacity is greater if headquarters implement certain practices of employee staffing, training, participation and performance appraisal.
Originality/value
This study extends existing research on RKT by examining the absorptive capacity of headquarters. Its main contribution is to provide evidence that MNCs can improve their RKT through HRM practices developed by the parent unit. This is original because most studies on RKT focus on HRM practices used by subsidiaries.
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Daniel Jiménez-Jiménez, Micaela Martínez-Costa and Raquel Sanz-Valle
The purpose of this paper is twofold: to study the relationship between reverse knowledge transfer (RKT) and headquarters’ innovation, examining potential moderators of such…
Abstract
Purpose
The purpose of this paper is twofold: to study the relationship between reverse knowledge transfer (RKT) and headquarters’ innovation, examining potential moderators of such relationship, and to analyze the role of headquarters’ absorptive capacity (AC) and the coordination mechanisms they adopt as antecedents of RKT.
Design/methodology/approach
Quantitative data were collected from 104 Spanish multinational companies. Structural equation modeling was used to test hypotheses.
Findings
Findings provide the evidence of a positive relationship between RKT and headquarters’ innovation. This relationship is higher when the knowledge transferred from subsidiaries to parent units is of a more tacit nature, and also when the organizational distance between them is larger. The results also show that the parent unit’s AC and the use of mechanisms for coordinating company units can facilitate RKT.
Practical implications
MNCs that wish to be more innovative should be aware that it is worth the effort of fostering RKT, especially when knowledge is more tacit and comes from subsidiaries with different organizational practices and culture because these two variables increase the positive relationship that it was found between effective RKT and the development of innovation in the headquarters. Additionally, results show that in order to facilitate RKT, the improvement of headquarters’ AC and the use of mechanisms of coordination between them and its subsidiaries can be useful.
Originality/value
Up to the authors’ knowledge, this is the first empirical study that examines the link between RKT and headquarters innovation, and one of the few that focuses on headquarters characteristics as determinants of RKT. Thus, the findings contribute to the literature that highlights the benefits of RKT for MNC’s competitiveness, and that seeks to know how to promote RKT.
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Vikramjit Singh, Khushdeep Goyal and Rakesh Goyal
This paper aims to investigate the hot corrosion behavior of Ni-Cr and Cr3C2-NiCr coatings, deposited on T11, P91 boiler steels by detonation gun spray coating (D-Gun) process to…
Abstract
Purpose
This paper aims to investigate the hot corrosion behavior of Ni-Cr and Cr3C2-NiCr coatings, deposited on T11, P91 boiler steels by detonation gun spray coating (D-Gun) process to enhance high temperature corrosion resistance.
Design/methodology/approach
Hot corrosion studies were conducted in secondary super heater zone of boiler at 900 °C for 10 cycles on bare and D-Gun coated steel specimens. The microhardness and porosity values of as-sprayed coatings were measured before exposing the specimens in the boiler environment. Each cycle consisted 100 h of heating in the boiler environment followed by 20 min of cooling in air. The weight change measurements were performed after each cycle to establish the kinetics of corrosion using thermogravimetric technique. X-ray diffraction, SEM techniques were used to analyze the corroded specimens.
Findings
Uncoated boiler steel experienced higher weight loss. The Cr3C2-NiCr coating was found to be more protective than Ni-Cr coating. The phases revealed the formation of oxide scale on coated specimens, mainly consist of nickel and chromium, which are reported to be protective against the hot corrosion.
Originality/value
There is very limited reported literature on hot corrosion behavior of Ni-Cr and Cr3C2-NiCr coatings deposited on the T11 and P91 substrates by detonation gun (D-gun) spray technique. T11 and P91 alloy steels have been chosen for this study because these two alloys are used to manufacture boiler tubes used in Indian thermal power plants.
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Hitesh Kyal, Anirban Mandal, Fedric Kujur and Sriparna Guha
This research would like to address the issues associated with individual entrepreneurial orientation, which involves entrepreneurial leadership and entrepreneurial ability as the…
Abstract
Purpose
This research would like to address the issues associated with individual entrepreneurial orientation, which involves entrepreneurial leadership and entrepreneurial ability as the key determinants of MSME growth. It will also explore both mediating and moderating roles of employee motivation and government intervention, respectively during the pandemic situation.
Design/methodology/approach
A purposive sampling technique was applied during pilot study and during the final data collection phases. Exploratory Factor Analysis (EFA) was conducted using varimax rotation to reduce a large number of variables into a smaller set of interpretable underlying factors. Further CFA and SEM are respectively applied to examine the psychometric properties of the scales and test the hypotheses of the research model.
Findings
The study's findings revealed a favourable association between entrepreneurial orientation, business financing, management, market practices, and MSME growth performance. The results support the notion that government policy plays a significant role as a full moderator.
Practical implications
Although the MSME sector receives government support, its implementation requires a skilled leader who can run the business profitability. The findings support this objective.
Originality/value
This paper seeks to give important insights into one of the understudied but quickly expanding MSME entrepreneurship, and how this environment influences individual entrepreneurial orientation and the formation of entrepreneurial leadership. This opens up a previously unexplored area for fresh insights and future study on enhancing entrepreneurship development research and practice for the MSME sector.