Overcoming intermediate-temperature brittleness via regulating trimodal γ' structure in a novel multi-principal element alloy

doi:10.1016/j.msea.2024.146099

IMR OpenIR

	Overcoming intermediate-temperature brittleness via regulating trimodal γ' structure in a novel multi-principal element alloy
	Wang, Yuting 1; Pang, Jingyu 1; Yang, Yitong 1,2; Zhang, Zhuqun 1,2; Ji, Yu ; Zhu, Zhengwang ; Zhang, Long 1; Wang, Aimin 1; Ma, Guofeng 4; Zhang, Haifeng 1,3; Zhang, Hongwei 1
通讯作者	Pang, Jingyu(jypang17s@imr.ac.cn) ; Zhang, Hongwei(hongweizhang@imr.ac.cn)
	2024-02-01
发表期刊	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN	0921-5093
卷号	892 页码:13
摘要	Solving the intermediate-temperature brittleness (ITB) of traditional superalloys and multi-principal element alloys (MPEAs) is a serious challenge. In this paper, a novel MPEA with superior mechanical performance is prepared and successfully overcomes the ITB by simple heat treatment. The effects of different solution treatments on the microstructure and mechanical properties of the alloy are studied. This work shows that the dendrite structure with trimodal gamma' structure is preserved by the subsolvus heat treatment. The heterogeneously distributed trimodal gamma' structure with high volume fraction primary gamma' phases in the interdendritic region effectively prevents the localized slip and enhances the pinning effect of grain boundaries, which inhibits the generation of ITB. The yield strengths of the MPEA with trimodal gamma' structure are 802 +/- 17 MPa at 973 K, 814 +/- 20.7 MPa at 1023 K and 776 +/- 9 MPa at 1073 K, respectively, which are superior than that of most cast superalloys and MPEAs. Moreover, the elongations of the MPEA at 973 K, 1023 K and 1073 K are 10.6 +/- 1.3 %, 14.2 +/- 1.4 % and 11.0 +/- 1.5 %, respectively, which increase by 214.9 %, 510 % and 219.4 %, respectively, compared with the MPEA with uniformly distributed bimodal gamma' structure. Meanwhile, the MPEA shows the best intermediate temperature plasticity (14.2 +/- 1.4 %) at 1023 K due to the microstwinning. The scheme of combining MPEAs with the trimodal gamma' structure and microtwinning opens up a new avenue for the development and manufacture of advanced high-temperature structural materials.
关键词	ulti-principal element superalloy intermediate-temperature brittleness gamma'-phae microtwin Dendrite
DOI	10.1016/j.msea.2024.146099
收录类别	SCI
语种	英语
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:001159131400001
出版者	ELSEVIER SCIENCE SA
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/184485
专题	中国科学院金属研究所
通讯作者	Pang, Jingyu; Zhang, Hongwei
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.Northeastern Univ, Sch Met, Shenyang 110819, Peoples R China 4.Shenyang Univ, Sch Mech & Engn, Shenyang 110044, Peoples R China
推荐引用方式 GB/T 7714	Wang, Yuting,Pang, Jingyu,Yang, Yitong,et al. Overcoming intermediate-temperature brittleness via regulating trimodal γ' structure in a novel multi-principal element alloy[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2024,892:13.
APA	Wang, Yuting.,Pang, Jingyu.,Yang, Yitong.,Zhang, Zhuqun.,Ji, Yu.,...&Zhang, Hongwei.(2024).Overcoming intermediate-temperature brittleness via regulating trimodal γ' structure in a novel multi-principal element alloy.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,892,13.
MLA	Wang, Yuting,et al."Overcoming intermediate-temperature brittleness via regulating trimodal γ' structure in a novel multi-principal element alloy".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 892(2024):13.