Superior superelasticity of laser powder bed fusion fabricated NiTi alloys achieved by post heat treatment

doi:10.1016/j.scriptamat.2024.116476

IMR OpenIR

	Superior superelasticity of laser powder bed fusion fabricated NiTi alloys achieved by post heat treatment
	Jiang, Muchi 1,2; Jiang, Hao 3,4; Xi, Rui 3,4; Ren, Dechun 1,2; Ji, Haibin 1,2; Lei, Jiafeng 1,2; Wang, Xiebin 3,4
通讯作者	Ren, Dechun(dcren14s@imr.ac.cn) ; Ji, Haibin(hbji@imr.ac.cn) ; Wang, Xiebin(xiebin.wang@email.sdu.edu.cn)
	2025-03-01
发表期刊	SCRIPTA MATERIALIA
ISSN	1359-6462
卷号	257 页码:6
摘要	In this work, we found that the long strip-like Ti4Ni2Ox phase, concentrated at the grain boundaries (GBs), is the primary reason for the inferior superelasticity of laser powder bed fusion (L-PBF) fabricated NiTi alloys. In order to improve the superelasticity of L-PBF produced NiTi alloy, we proposed a simple yet efficient heat treatment protocol, which includes solution treatment at 1273 K for 3 h and subsequent aging treatment at 623 K for 0.5 h. The solution treatment leads to the spheroidization and coarsening of the Ti4Ni2Ox phase, as well as the growth of NiTi grains. The grain growth captures Ti4Ni2Ox phase at GBs into the grain interior, which improves largely the integrity of the matrix. Aging treatment introduces Ni4Ti3 nanoprecipiates, which could improve the stability of superelasiticity. As a result, NiTi alloy with excellent superelasticity is obtained, which shows a recovery rate of >80 % (pre-strian of 5 %) after 317 cycles.
关键词	Additive manufacturing Laser powder bed fusion Shape memory alloys NiTi Superelasticity
资助者	Foundation of Shandong Province ; Natural Science Foundation of Shandong Province
DOI	10.1016/j.scriptamat.2024.116476
收录类别	SCI
语种	英语
资助项目	Foundation of Shandong Province[tsqn202211002] ; Natural Science Foundation of Shandong Province[ZR2022ZD08]
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001371049000001
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/181276
专题	中国科学院金属研究所
通讯作者	Ren, Dechun; Ji, Haibin; Wang, Xiebin
作者单位	1.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.Shandong Univ, State key Lab Adv Equipment & Technol Met Forming, Jingshi Rd 17923, Jinan 250061, Peoples R China 4.Shandong Univ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Minist Educ, Jingshi Rd 17923, Jinan 250061, Peoples R China
推荐引用方式 GB/T 7714	Jiang, Muchi,Jiang, Hao,Xi, Rui,et al. Superior superelasticity of laser powder bed fusion fabricated NiTi alloys achieved by post heat treatment[J]. SCRIPTA MATERIALIA,2025,257:6.
APA	Jiang, Muchi.,Jiang, Hao.,Xi, Rui.,Ren, Dechun.,Ji, Haibin.,...&Wang, Xiebin.(2025).Superior superelasticity of laser powder bed fusion fabricated NiTi alloys achieved by post heat treatment.SCRIPTA MATERIALIA,257,6.
MLA	Jiang, Muchi,et al."Superior superelasticity of laser powder bed fusion fabricated NiTi alloys achieved by post heat treatment".SCRIPTA MATERIALIA 257(2025):6.