The rheological behavior of brittle BMGs of Cu44.25Ag14.75Zr36Ti5 and Ti32.8Zr30.2Cu9Ni5.3Be22.7 in the supercooled liquid region

doi:10.1016/j.jnoncrysol.2024.123210

IMR OpenIR

	The rheological behavior of brittle BMGs of Cu_44.25Ag_14.75Zr₃₆Ti₅ and Ti_32.8Zr_30.2Cu₉Ni_5.3Be_22.7 in the supercooled liquid region
	Wang, Rujie 1,2; Yao, Huaxin 1,3; Wang, Engang 1,2; Shen, Yong 4; Jia, Peng 1,3
通讯作者	Shen, Yong(yongshen@imr.ac.cn) ; Jia, Peng(pjia@epm.neu.edu.cn)
	2024-12-15
发表期刊	JOURNAL OF NON-CRYSTALLINE SOLIDS
ISSN	0022-3093
卷号	646 页码:8
摘要	Bulk metallic glasses (BMGs) show limited plasticity at room temperature. However, BMGs usually exhibit superplasticity and high plastic forming ability in their supercooled liquid region (SLR). The rheological behavior of BMGs in SLR is vitally important to their thermoplastic forming process. In contrast to the ductile BMGs, thermoplastic deformation behavior of brittle BMGs is rarely reported. In present work, the rheological behavior of two brittle BMGs with high glass forming ability Cu44.25Ag14.75Zr36Ti5 and Ti32.8Zr30.2Cu9Ni5.3Be22.7 was investigated on Gleeble3500. The two BMGs can deform homogeneously depending on the temperature and strain rate. According to the high value of m (strain rate sensitivity index), which is the most important mechanical characteristic of a superplastic material, the two BMGs show superplasticity in their SLR with m >= 0.3. Based on the free volume model, their activation volumes are calculated as 0.263 similar to 0.486 nm(3) and 1.261 similar to 1.650 nm(3), indicating the minimum displacement clusters with average 26 similar to 48 and 91 similar to 127 atoms, for Cu44.25Ag14.75Zr36Ti5 and Ti32.8Zr30.2Cu9Ni5.3Be22.7, respectively. Thus, the two investigated brittle BMGs can be thermoplastic processed in the SLR and the deformation maps are given. BMG Cu44.25Ag14.75Zr36Ti5 shows better machinable property than Ti32.8Zr30.2Cu9Ni5.3Be22.7. Compared to the ductile BMGs, no Newtonian flow is found for the two investigated brittle BMGs.
关键词	Amorphous alloy Supercooled liquid region Thermoplastic deformation Superplasticity
资助者	National Nat-ural Science Foundation of China
DOI	10.1016/j.jnoncrysol.2024.123210
收录类别	SCI
语种	英语
资助项目	National Nat-ural Science Foundation of China[52371021]
WOS研究方向	Materials Science
WOS类目	Materials Science, Ceramics ; Materials Science, Multidisciplinary
WOS记录号	WOS:001311362700001
出版者	ELSEVIER
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/189907
专题	中国科学院金属研究所
通讯作者	Shen, Yong; Jia, Peng
作者单位	1.Northeastern Univ, Key Lab Electromagnet Proc Mat, Minist Educ, Shenyang 110819, Peoples R China 2.Northeastern Univ, Sch Met, Shenyang 110819, Peoples R China 3.Northeastern Univ, Sch Mat Sci & Engn, Shenyang 110819, Peoples R China 4.Chinese Acad Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Wang, Rujie,Yao, Huaxin,Wang, Engang,et al. The rheological behavior of brittle BMGs of Cu_44.25Ag_14.75Zr₃₆Ti₅ and Ti_32.8Zr_30.2Cu₉Ni_5.3Be_22.7 in the supercooled liquid region[J]. JOURNAL OF NON-CRYSTALLINE SOLIDS,2024,646:8.
APA	Wang, Rujie,Yao, Huaxin,Wang, Engang,Shen, Yong,&Jia, Peng.(2024).The rheological behavior of brittle BMGs of Cu_44.25Ag_14.75Zr₃₆Ti₅ and Ti_32.8Zr_30.2Cu₉Ni_5.3Be_22.7 in the supercooled liquid region.JOURNAL OF NON-CRYSTALLINE SOLIDS,646,8.
MLA	Wang, Rujie,et al."The rheological behavior of brittle BMGs of Cu_44.25Ag_14.75Zr₃₆Ti₅ and Ti_32.8Zr_30.2Cu₉Ni_5.3Be_22.7 in the supercooled liquid region".JOURNAL OF NON-CRYSTALLINE SOLIDS 646(2024):8.