Effects of Al addition and cryogenic cyclic treatment on impact toughness of phase-transformable Ti-based bulk metallic glass composites  

作　　者：Tingyi Yan Long Zhang R.Lakshmi Narayan Jingyu Pang Yi Wu Huameng Fu Hong Li Upadrasta Ramamurty Haifeng Zhang 

机构地区：[1]Shi-changxu Innovation Center for Advanced Materials,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China [2]School of Materials Science and Engineering,University of Science and Technology of China,Shenyang 110016,China [3]CAS Key Laboratory of Nuclear Materials and Safety Assessment,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China [4]Department of Materials Science and Engineering,Indian Institute of Technology Delhi,Hauz Khas,New Delhi 110016,India [5]Department of Mechanical and Aerospace Engineering in Nanyang Technological University,Singapore 637331,Singapore [6]Institute of Materials Research and Engineering,Agency for Science,Technology and Research(A∗STAR),Singapore 138634,Singapore

出　　处：《Journal of Materials Science & Technology》2023年第9期210-220,共11页材料科学技术（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.52171164 and 51790484);National Key Laboratory of Science and Technology on Materials under Shock and Impact(WDZC2022-13);the National Key Research and Development Program of China(No.2021YFA0716303);Start-up research grant(No.SRG/2020/000095)of Science and Engineering Research Board,DST,GoI.A∗STAR,Singapore via the Structural Metals and Alloys Program(No.A18B1b0061);the Natural Science Foundation of Liaoning Province(No.2021-MS-009);the China Manned Space Engineering,the Chinese Academy of Sciences(ZDBS-LY-JSC023);the Youth Innovation Promotion Association CAS(No.2021188).

摘　　要：Developing bulk metallic glass composites(BMGCs)with high toughness is vital for their practical application.However,the influence of different microstructures on the impact toughness of BMGCs is still unclear.The effects of Al addition and cryogenic cyclic treatment(CCT)on the Charpy impact toughness,a K,at 298 and 77 K of a series of phase-transformable BMGCs are investigated in this work.It is found that deformation-induced martensitic transformation(DIMT)of theβ-Ti dendrites is the dominant toughening mechanism in the phase-transformable BMGCs at 298 K,but at 77 K,the toughness of BMGCs is primarily determined by the intrinsic toughness of the glass matrix.The addition of Al can moderately tune theβ-Ti phase stability,which then affects the amount of DIMT and impact toughness of the BMGCs at 298 K.However,at 77 K,Al addition causes a monotonic decrease in the toughness of the BMGCs due to the embrittlement of the glass matrix.It is found that CCT can effectively rejuvenate the phase-transformable BMGCs,which results in an enhanced impact toughness at 298 K.However,the toughness at 77 K monotonously decreases with increasing the number of CCT cycles,suggesting that the rejuvenation of the glass matrix affects the toughness at both 298 and 77 K of BMGCs,but in dramatically different ways.These findings reveal the influence of microstructures and CCT on the impact toughness of BMGCs and provide insights that could be useful for designing tougher BMGs and BMGCs.

关 键 词：Bulk metallic glass composites Charpy impact toughness Deformation-induced martensitic transformation METASTABILITY Thermal cycling rejuvenation 

分 类 号：TB331[一般工业技术—材料科学与工程]