Indrajeet Katti, Alistair Jones, Matthias Weiss, Dong Qiu, Joy H. Forsmark and Mark Easton
Powder bed fusion-laser beam (PBF-LB) is a rapidly growing manufacturing technology for producing Al-Si alloys. This technology can be used to produce high-pressure die-casting…
Abstract
Purpose
Powder bed fusion-laser beam (PBF-LB) is a rapidly growing manufacturing technology for producing Al-Si alloys. This technology can be used to produce high-pressure die-casting (HPDC) prototypes. The purpose of this paper is to understand the similarities and differences in the microstructures and properties of PBF-LB and HPDC alloys.
Design/methodology/approach
PBF-LB AlSi10Mg and HPDC AlSi10Mn plates with different thicknesses were manufactured. Iso-thermal heat treatment was conducted on PBF-LB bending plates. A detailed meso-micro-nanostructure analysis was performed. Tensile, bending and microhardness tests were conducted on both alloys.
Findings
The PBF-LB skin was highly textured and softer than its core, opposite to what is observed in the HPDC alloy. Increasing sample thickness increased the bulk strength for the PBF-LB alloy, contrasting with the decrease for the HPDC alloy. In addition, the tolerance to fracture initiation during bending deformation is greater for the HPDC material, probably due to its stronger skin region.
Practical implications
This knowledge is crucial to understand how geometry of parts may affect the properties of PBF-LB components. In particular, understanding the role of geometry is important when using PBF-LB as a HPDC prototype.
Originality/value
This is the first comprehensive meso-micro-nanostructure comparison of both PBF-LB and HPDC alloys from the millimetre to nanometre scale reported to date that also considers variations in the skin versus core microstructure and mechanical properties.
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This article is based on the text of a BBC blog dated 26 November 2009, by Mark Easton. The piece reflects on The First National Personality Disorder Congress.
Abstract
This article is based on the text of a BBC blog dated 26 November 2009, by Mark Easton. The piece reflects on The First National Personality Disorder Congress.
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This report concerns itself with the process of change that has been underway in the city of Salford, concerning the adoption of a recovery‐oriented system of care. The paper…
Abstract
This report concerns itself with the process of change that has been underway in the city of Salford, concerning the adoption of a recovery‐oriented system of care. The paper contains the observations of the lead commissioner for drug treatment in Salford on the process of this change. The paper is influenced by William White's perspectives on recovery in Philadelphia and makes observations on their application in the British context. Finally, there is some discussion of whether this recovery approach constitutes a ‘paradigm change’ in UK drug policy. The information provided in this paper was gathered between January 2009 and July 2010. The methods included 12 initial unstructured interviews with service users self‐defined as ‘in recovery’, combined with two focus groups with seven service users and six members of staff. This initial work was then supplemented with three further focus groups conducted during the summer of 2009, involving 23 front line staff during the summer and autumn of 2009 and 52 consumer satisfaction questionnaires conducted prior to Christmas 2009. A further 40 semi‐structured interviews with service users who self‐defined as being in recovery were also concluded during the spring and summer of 2010.
It is probably well known to the majority of educated Englishmen that in the United States of America two kinds of Government exist side by side, and are jointly responsible to…
Abstract
It is probably well known to the majority of educated Englishmen that in the United States of America two kinds of Government exist side by side, and are jointly responsible to the people for the conduct of the external and internal relations of the Republic. These two forms of government are represented by the Federal Government and by the several governments of the different States of the Union.
One of the main features of the reform of the Mental Health Act 2007 was the introduction of community treatment orders (CTOs). CTOs represent a fundamental shift in the rights of…
Abstract
One of the main features of the reform of the Mental Health Act 2007 was the introduction of community treatment orders (CTOs). CTOs represent a fundamental shift in the rights of people with severe mental health problems, who have been detained in hospital under section 3 of the Mental Health Act and subsequently discharged. The call for the introduction of CTOs or similar legislation has been a feature of mental health policy over the past 20 years. Despite the detailed discussion of the relationship between ethnicity and psychiatry, there has been very little attention paid to the way that race was a factor in the community care scandals of the 1990s. This article, through the consideration of two very high profile cases ‐ Christopher Clunis and Ben Silcock, explores the media's influence on the construction of the debate in this area. In particular, it explores the way that the media reporting of the two cases had a role in not only perpetuating racial stereotyping, but also the stigmatising of those experiencing acute mental health problems. In addition, with the use of government papers obtained under the Freedom of Information Act, it considers the response to and the attempts to influence the media debate at that time.
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The purpose of this paper is to put forth a practical guide for improving communications and getting what you want from relationships.
Abstract
Purpose
The purpose of this paper is to put forth a practical guide for improving communications and getting what you want from relationships.
Design/methodology/approach
This is an opinion piece based on a speech given by the author at the Chartered Institute of Housing's annual conference.
Findings
Forming partnerships between local authorities and housing associations is vital in tackling the problem of un-affordable housing.
Originality/value
This article is based on a speech given by the author and offers the viewpoint of said author.
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Kerry Sheldon and Allison Tennant
This paper provides a clinical practice overview of the challenges that can arise when working with dangerous and severe personality‐disordered patients in a high secure hospital…
Abstract
This paper provides a clinical practice overview of the challenges that can arise when working with dangerous and severe personality‐disordered patients in a high secure hospital. Poor engagement and treatment readiness, mistrust, paranoia and dominant interpersonal styles are all clinical features that affect treatment delivery. The paper discusses the impact of these features, and suggests how clinicians can engage effectively with individuals who have personality disorders in regard to therapy in general.
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Assuming that the relations between the Local Authority and their Public Analyst are, as regards fixity of tenure, established on a satisfactory basis, there remain some very…
Abstract
Assuming that the relations between the Local Authority and their Public Analyst are, as regards fixity of tenure, established on a satisfactory basis, there remain some very important points to be discussed, namely, the duties of that officer, the conditions under which he works, and his relations to his colleagues on the staff. These are matters which, so far as we know, have never previously been dealt with in print, are only partially regulated by law, and are not settled by any uniformity of practice on the part of Local Authorities.
This study provides a comprehensive framework of adaptation in triadic business relationship settings in the service sector. The framework is based on the industrial network…
Abstract
This study provides a comprehensive framework of adaptation in triadic business relationship settings in the service sector. The framework is based on the industrial network approach (see, e.g., Axelsson & Easton, 1992; Håkansson & Snehota, 1995a). The study describes how adaptations initiate, how they progress, and what the outcomes of these adaptations are. Furthermore, the framework takes into account how adaptations spread in triadic relationship settings. The empirical context is corporate travel management, which is a chain of activities where an industrial enterprise, and its preferred travel agency and service supplier partners combine their resources. The scientific philosophy, on which the knowledge creation is based, is realist ontology. Epistemologically, the study relies on constructionist processes and interpretation. Case studies with in-depth interviews are the main source of data.