Next Article in Journal / Special Issue
Testbed for Multilayer Conformal Additive Manufacturing
Previous Article in Journal
Effect of Heat Treatment on the Microstructure of Mg-4Al-Nd Alloys
Previous Article in Special Issue
Compression Tests of ABS Specimens for UAV Components Produced via the FDM Technique
Article Menu

Export Article

Open AccessArticle
Technologies 2017, 5(2), 24; doi:10.3390/technologies5020024

Customised Alloy Blends for In-Situ Al339 Alloy Formation Using Anchorless Selective Laser Melting

1
Department of Mechanical Engineering, University of Sheffield, Sheffield S1 3JD, UK
2
Department of Materials Science and Engineering, University of Sheffield, Sheffield S1 3JD, UK
*
Author to whom correspondence should be addressed.
Academic Editors: Salvatore Brischetto, Paolo Maggiore and Carlo Giovanni Ferro
Received: 31 March 2017 / Revised: 18 May 2017 / Accepted: 19 May 2017 / Published: 24 May 2017
(This article belongs to the Special Issue Additive Manufacturing Technologies and Applications)
View Full-Text   |   Download PDF [5623 KB, uploaded 24 May 2017]   |  

Abstract

The additive manufacturing process Selective Laser Melting (SLM) can generate large thermal gradients during the processing of metallic powder; this can in turn lead to increased residual stress formation within a component. Metal anchors or support structures are required to be built during the process and forcibly hold SLM components to a substrate plate and minimise geometric distortion/warpage due to the process induced thermal residual stress. The requirement for support structures can limit the geometric freedom of the SLM process and increase post-processing operations. A novel method known as Anchorless Selective Laser Melting (ASLM) maintains processed material within a stress relieved state throughout the duration of a build. As a result, metal components formed using ASLM do not develop signification residual stresses within the process, thus, the conventional support structures or anchors used are not required to prevent geometric distortion. ASLM locally melts two or more compositionally distinct powdered materials that alloy under the action of the laser, forming into various combinations of hypo/hyper eutectic alloys with a new reduced solidification temperature. This new alloy is maintained in a semi-solid or stress reduced state for a prolonged period during the build with the assistance of elevated powder bed pre-heating. In this paper, custom blends of alloys are designed, manufactured and processed using ASLM. The purpose of this work is to create an Al339 alloy from compositionally distinct powder blends. The in-situ alloying of this material and ASLM processing conditions allowed components to be built in a stress-relieved state, enabling the manufacture of overhanging and unsupported features. View Full-Text
Keywords: additive manufacturing; selective laser melting; alloy design; in-situ alloying additive manufacturing; selective laser melting; alloy design; in-situ alloying
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Vora, P.; Martinez, R.; Hopkinson, N.; Todd, I.; Mumtaz, K. Customised Alloy Blends for In-Situ Al339 Alloy Formation Using Anchorless Selective Laser Melting. Technologies 2017, 5, 24.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Technologies EISSN 2227-7080 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top