EFFECT OF HOT ISOSTATIC PRESSING PARAMETERS ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF POWDER METALLURGY Ti-5Al-2.5Sn ELI ALLOY

doi:10.11900/0412.1961.2016.00018

IMR OpenIR

	EFFECT OF HOT ISOSTATIC PRESSING PARAMETERS ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF POWDER METALLURGY Ti-5Al-2.5Sn ELI ALLOY
	Guo Ruipeng 1,2; Xu Lei 1; Cheng Wenxiang 3; Lei Jiafeng 1; Yang Rui 1
通讯作者	Xu Lei(lxu@imr.ac.cn)
	2016-07-01
发表期刊	ACTA METALLURGICA SINICA
ISSN	0412-1961
卷号	52 期号:7 页码:842-850
摘要	Near-net-shape forming through powder metallurgy (PM) route is a cost-efficient approach to produce the hard-to-machining materials such as titanium alloys. Hot isostatic pressing (HIPing) is a common technique to fabricate PM titanium alloys and components. Prealloyed powder metallurgy through HIPing is considered as upgrade of precision casting for titanium alloys. Ti-5Al-2.5Sn ELI (extra-low interstitial) is a typical alpha-Ti alloy, which is widely used at cryogenic temperature. In this work, the Ti-5Al-2.5Sn ELI prealloyed powder was produced by electrode induction melting gas atomization. Characterization of the prealloyed powder was carried out to understand the following HIPing process. The influence of HIPing parameters on microstructure and mechanical properties of Ti-5Al-2.5Sn ELI powder compact was studied. The results show that the relative density of powder compact increases with the increasing of HIPing temperature and pressure. The mechanical properties of powder compact can achieve those of wrought materials, when the relative density is more than 99.5%. To balance the relative density, microstructure and mechanical properties of the powder compacts, the optimized HIPing parameters for Ti-5Al-2.5Sn ELI powder are temperature in the range of 890 similar to 940 degrees C, pressure above 120 MPa and holding for 3 h. The shielding effect of capsule will hinder the powder densification during HIPing process, which will likely cause non-uniform densification and degrade the relative density of powder compact. However, the shield effect can be weakened through proper tooling design and optimization of the HIPing procedure.
关键词	Ti-5Al-2.5Sn ELI powder metallurgy hot isostatic pressing shielding effect
DOI	10.11900/0412.1961.2016.00018
收录类别	SCI
语种	英语
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000385747800009
出版者	SCIENCE PRESS
引用统计	被引频次：9[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/123032
专题	中国科学院金属研究所
通讯作者	Xu Lei
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Northeastern Univ, Sch Mat Sci & Engn, Shenyang 110819, Peoples R China 3.Res Inst Baoshan Iron & Steel Co Ltd, Shanghai 201900, Peoples R China
推荐引用方式 GB/T 7714	Guo Ruipeng,Xu Lei,Cheng Wenxiang,et al. EFFECT OF HOT ISOSTATIC PRESSING PARAMETERS ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF POWDER METALLURGY Ti-5Al-2.5Sn ELI ALLOY[J]. ACTA METALLURGICA SINICA,2016,52(7):842-850.
APA	Guo Ruipeng,Xu Lei,Cheng Wenxiang,Lei Jiafeng,&Yang Rui.(2016).EFFECT OF HOT ISOSTATIC PRESSING PARAMETERS ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF POWDER METALLURGY Ti-5Al-2.5Sn ELI ALLOY.ACTA METALLURGICA SINICA,52(7),842-850.
MLA	Guo Ruipeng,et al."EFFECT OF HOT ISOSTATIC PRESSING PARAMETERS ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF POWDER METALLURGY Ti-5Al-2.5Sn ELI ALLOY".ACTA METALLURGICA SINICA 52.7(2016):842-850.