Shear fracture in bulk metallic glass composites

doi:10.1016/j.actamat.2021.116963

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	Shear fracture in bulk metallic glass composites
	Rajpoot, Devashish 1,3; Narayan, R. Lakshmi 2; Zhang, Long 5; Kumar, Punit 1; Zhang, Haifeng 5; Tandaiya, Parag 3; Ramamurty, Upadrasta 1,4
刊名	ACTA MATERIALIA
	2021-07-01
卷号	213 页码:16
关键词	Bulk metallic glass composites Fracture Martensitic transformation Shear bands Plastic deformation
ISSN号	1359-6454
DOI	10.1016/j.actamat.2021.116963
通讯作者	Narayan, R. Lakshmi(rlnarayan@mse.iitd.ac.in) ; Zhang, Long(zhanglong@imr.ac.cn) ; Tandaiya, Parag(parag.ut@iitb.ac.in)
英文摘要	Fracture behavior of bulk metallic glass matrix composites (BMGCs) with both transforming and non-transforming fi-Ti dendrites under shear and opening modes was examined. Experimental results show that the fracture toughness of all three BMGCs is considerably lower in mode II than in mode I, due primarily to the shear dominant stress state in the former, which renders easy shear band initiation. However, stable crack growth in mode I is insignificant whereas it is considerable in mode II. The tough-ness of BMGCs reinforced with coarse but non-transforming dendrites in both the modes is higher than the respective values in BMGCs with transforming fi-Ti inspite of their ability to strain harden and hence enhanced ductility. Fracture surface features and shear band patterns at notch tips of both mode I and mode II specimens indicate that despite the interactions of dendrites with the shear bands, the fracture criterion and mechanism of BMGCs is identical to that in BMGs. The differences in the fracture behaviour of these BMGCs is rationalized by considering the effect of relaxation enthalpy of the amorphous ma-trices in addition to the length scale and transforming tendency of the dendrites on the transformation of a shear band into a crack. Implications of these results in terms improving the fracture toughness of BMGCs with transforming dendrites is discussed. (c) 2021 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
资助项目	Science and engineering research board, DST, GoI[SRG/2020/000095] ; IITB-NTU joint PhD Degree Program ; A* STAR via the Structural Metals and Alloys Programme[A18B1b0061] ; National Natural Science Foundation of China[51701213] ; National Natural Science Foundation of China[51790484] ; Chinese Academy of Sciences[ZDBS-LY-JSC023] ; Youth Innovation Promotion Association CAS
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000670077800003
资助机构	Science and engineering research board, DST, GoI ; IITB-NTU joint PhD Degree Program ; A* STAR via the Structural Metals and Alloys Programme ; National Natural Science Foundation of China ; Chinese Academy of Sciences ; Youth Innovation Promotion Association CAS
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/159692]
专题	金属研究所_中国科学院金属研究所
通讯作者	Narayan, R. Lakshmi; Zhang, Long; Tandaiya, Parag
作者单位	1.Nanyang Technol Univ, Dept Mech & Aerosp Engn, Singapore 637331, Singapore 2.Indian Inst Technol Delhi, Dept Mat Sci & Engn, New Delhi 110016, India 3.Indian Inst Technol, Dept Mech Engn, Mumbai 400076, Maharashtra, India 4.ASTAR, Inst Mat Res & Engn, Singapore 138634, Singapore 5.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Rajpoot, Devashish,Narayan, R. Lakshmi,Zhang, Long,et al. Shear fracture in bulk metallic glass composites[J]. ACTA MATERIALIA,2021,213:16.
APA	Rajpoot, Devashish.,Narayan, R. Lakshmi.,Zhang, Long.,Kumar, Punit.,Zhang, Haifeng.,...&Ramamurty, Upadrasta.(2021).Shear fracture in bulk metallic glass composites.ACTA MATERIALIA,213,16.
MLA	Rajpoot, Devashish,et al."Shear fracture in bulk metallic glass composites".ACTA MATERIALIA 213(2021):16.