Agnieszka Chmielewska, Bartlomiej Adam Wysocki, Elżbieta Gadalińska, Eric MacDonald, Bogusława Adamczyk-Cieślak, David Dean and Wojciech Świeszkowski
The purpose of this paper is to investigate the effect of remelting each layer on the homogeneity of nickel-titanium (NiTi) parts fabricated from elemental nickel and titanium…
Abstract
Purpose
The purpose of this paper is to investigate the effect of remelting each layer on the homogeneity of nickel-titanium (NiTi) parts fabricated from elemental nickel and titanium powders using laser powder bed fusion (LPBF). In addition, the influence of manufacturing parameters and different melting strategies, including multiple cycles of remelting, on printability and macro defects, such as pore and crack formation, have been investigated.
Design/methodology/approach
An LPBF process was used to manufacture NiTi alloy from elementally blended powders and was evaluated with the use of a remelting scanning strategy to improve the homogeneity of fabricated specimens. Furthermore, both single melt and up to two remeltings were used.
Findings
The results indicate that remelting can be beneficial for density improvement as well as chemical and phase composition homogenization. Backscattered electron mode in scanning electron microscope showed a reduction in the presence of unmixed Ni and Ti elemental powders in response to increasing the number of remelts. The microhardness values of NiTi parts for the different numbers of melts studied were similar and ranged from 487 to 495 HV. Nevertheless, it was observed that measurement error decreases as the number of remelts increases, suggesting an increase in chemical and phase composition homogeneity. However, X-ray diffraction analysis revealed the presence of multiple phases regardless of the number of melt runs.
Originality/value
For the first time, to the best of the authors’ knowledge, elementally blended NiTi powders were fabricated via LPBF using remelting scanning strategies.
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Barbara Chmielewska and Agnieszka Wróbel
The purpose of this paper is to show the beginnings and development of digitization processes in University of Warsaw Library by examining the digital library of e‐bUW.
Abstract
Purpose
The purpose of this paper is to show the beginnings and development of digitization processes in University of Warsaw Library by examining the digital library of e‐bUW.
Design/methodology/approach
The main method is the comparison to other similar actions within the country of Poland. The subject scope of the paper also includes a description of methods of presenting digitized collections to patrons.
Findings
It turned out that fair visibility of catalogue records of digitized material is possible mainly because the Library of Warsaw University is a member of Digital Libraries Federation (Federacja Bibliotek Cyfrowych). Since 2007 the collection has been visited by over 5 million readers.
Originality/value
The original value of the paper is made by presenting efforts of one country on an international level to a broader audience with special attention to individual solutions.
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Agnieszka Bieńkowska, Sabina Kubiciel-Lodzińska, Jolanta Maj and Katarzyna Tworek
Amidst dynamic global changes, migrant workforce dynamics have become complex due to voluntary and forced migrations, coupled with talent competition. Paradoxically, many migrants…
Abstract
Purpose
Amidst dynamic global changes, migrant workforce dynamics have become complex due to voluntary and forced migrations, coupled with talent competition. Paradoxically, many migrants experience deskilling and brain waste in host countries. To optimize migrant skills for enhanced job performance in fluctuating organizational and environmental contexts, it is vital to overcome this challenge. This study aims to verify the employees’ dynamic capabilities (EDC) based job performance model among migrants, exploring how the moderating effect of a meaning of life influences the relationship between EDC and job performance, considering job-related attitudes.
Design/methodology/approach
We conducted empirical research based on a survey of 453 Ukrainian migrants currently residing in Poland.
Findings
The results indicate that EDC influences job performance through person-job fit, work motivation, and job satisfaction. Particularly, migrants with a positive meaning of life show stronger relationships between EDC and job performance.
Originality/value
The article’s originality lies in exploring the concept of EDC within the context of migrant workers, bridging a gap in understanding how these capabilities impact job performance, particularly regarding brain waste and deskilling. The study delves into how EDC could mitigate the mismatch between migrant workers’ qualifications and job placements, thereby enriching international human resources management strategies to foster inclusive workplaces and enhance migrant workforce success.