期刊
SCRIPTA MATERIALIA
卷 122, 期 -, 页码 72-76出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2016.05.002
关键词
Additive manufacture; Selective electron beam melting (SEBM); Pores; Heat treatment; Hot isostatic pressing (HIPing)
类别
资金
- EPSRC [EP/L025213/1, EP/L016273/1, EP/F007906/1, EP/F001452/1, EP/M010619/1]
- EPSRC [EP/L025213/1, EP/F001452/1, EP/M010619/1, EP/H020047/1, EP/K030884/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/M010619/1, EP/K030884/1, EP/L025213/1, EP/F007906/1, EP/F001452/1, EP/H020047/1] Funding Source: researchfish
X-ray computed tomography has been used to track the behaviour of individual pores found in selective electron beam melted additive manufactured titanium. Porosity was found to shrink below the detection limit of X-ray microtomography (<5 mu m) upon hot isostatic pressing. Spherical argon containing gas pores, which have a high internal gas pressure following hot isostatic pressing, have been found to progressively reappear and grow in proportion to their original as-built size during high temperature (beta-anneal) treatments, whereas larger irregular low pressure pores did not reappear. The implications of these observations in terms of additive manufacturing are discussed. (C) 2016 Elsevier Ltd. All rights reserved. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
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