Locating the optimal microstructural state against dynamic perforation by evaluating the strain-rate dependences of strength and hardness

doi:10.1016/j.ijimpeng.2021.103856

CORC > 金属研究所 > 中国科学院金属研究所

	Locating the optimal microstructural state against dynamic perforation by evaluating the strain-rate dependences of strength and hardness
	Wu, S. J.1,2; Qu, R. T.1,2,4; Liu, Z. C.3; Li, H. F.1,2; Wang, X. D.1; Tan, C. W.3; Zhang, P.1,2; Zhang, Z. F.1,2
刊名	INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
	2021-06-01
卷号	152 页码:13
关键词	Dynamic hardness Dynamic strength Strain-rate hardening Dynamic perforation
ISSN号	0734-743X
DOI	10.1016/j.ijimpeng.2021.103856
通讯作者	Qu, R. T.(rtqu@nwpu.edu.cn) ; Tan, C. W.(tanchengwen@126.com) ; Zhang, Z. F.(zhfzhang@imr.ac.cn)
英文摘要	Intense research efforts have been made to understand the variation of strength with strain rate, while the mechanisms governing the strain-rate dependence of hardness have been rarely studied. In this work, we conducted a comprehensive investigation on strength, hardness and failure mechanism of AISI 4340 steels with 4 different microstructural states in a wide range of loading rate. We found strain-rate hardening behavior in all 4 steels, while the degree of hardening, characterized by the normalized dynamic strength (NDS) or the normalized dynamic hardness (NDH), depends on not only materials but also loading modes. With the increase of material strength, the NDS significantly increases but the NDH decreases slightly. The inconsistency between the variations of NDS and NDH is because the hardness is governed by not only yield strength but strain-hardening ability. Although the yield strength increases as rising strain rate, the strain-hardening ability reduces obviously, particularly for high-strength materials due to shear softening under dynamic loading conditions, which also causes a transition from homogeneous deformation to shear fracture. The variations of NDS and NDH could reflect the trends for resisting not only the ductile perforation (strength limited) but also the shear plugging failure (toughness limited), allowing to propose a criterion for locating the optimal strength-toughness combination against dynamic perforation, which was further verified by the ballistic penetration testing results. Moreover, similar behaviors of NDS and NDH of various other alloys were also found, which may suggest the extensive applicability of the current approach.
资助项目	National Natural Science Foundation of China (NSFC)[51771205] ; LiaoNing Revitalization Talents Program[XLYC1808027]
WOS研究方向	Engineering ; Mechanics
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000633048500002
资助机构	National Natural Science Foundation of China (NSFC) ; LiaoNing Revitalization Talents Program
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/161861]
专题	金属研究所_中国科学院金属研究所
通讯作者	Qu, R. T.; Tan, C. W.; Zhang, Z. F.
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China 3.Beijing Inst Technol, Sch Mat Sci & Engn, Beijing 100081, Peoples R China 4.Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China
推荐引用方式 GB/T 7714	Wu, S. J.,Qu, R. T.,Liu, Z. C.,et al. Locating the optimal microstructural state against dynamic perforation by evaluating the strain-rate dependences of strength and hardness[J]. INTERNATIONAL JOURNAL OF IMPACT ENGINEERING,2021,152:13.
APA	Wu, S. J..,Qu, R. T..,Liu, Z. C..,Li, H. F..,Wang, X. D..,...&Zhang, Z. F..(2021).Locating the optimal microstructural state against dynamic perforation by evaluating the strain-rate dependences of strength and hardness.INTERNATIONAL JOURNAL OF IMPACT ENGINEERING,152,13.
MLA	Wu, S. J.,et al."Locating the optimal microstructural state against dynamic perforation by evaluating the strain-rate dependences of strength and hardness".INTERNATIONAL JOURNAL OF IMPACT ENGINEERING 152(2021):13.