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EFFECT OF HOT ISOSTATIC PRESSING PARAMETERS ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF POWDER METALLURGY Ti-5Al-2.5Sn ELI ALLOY
Guo Ruipeng1,2; Xu Lei1; Cheng Wenxiang3; Lei Jiafeng1; Yang Rui1
Corresponding AuthorXu Lei(lxu@imr.ac.cn)
2016-07-01
Source PublicationACTA METALLURGICA SINICA
ISSN0412-1961
Volume52Issue:7Pages:842-850
AbstractNear-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.
KeywordTi-5Al-2.5Sn ELI powder metallurgy hot isostatic pressing shielding effect
DOI10.11900/0412.1961.2016.00018
Indexed BySCI
Language英语
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000385747800009
PublisherSCIENCE PRESS
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/123035
Collection中国科学院金属研究所
Corresponding AuthorXu Lei
Affiliation1.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
Recommended Citation
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.
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