Shock and spall behaviors of a high specific strength steel: Effects of impact stress and microstructure

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	Shock and spall behaviors of a high specific strength steel: Effects of impact stress and microstructure
	Wang W; Zhang HS(张虎生); Yang MX(杨沐鑫); Jiang P(姜萍); Yuan FP(袁福平); Wu XL(武晓雷)
刊名	JOURNAL OF APPLIED PHYSICS
	2017-04-07
卷号	121 期号:13
ISSN号	0021-8979
中文摘要	A series of plate-impact experiments were conducted to investigate the influences of impact stress and microstructure on the shock and spall behaviors of a high specific strength steel (HSSS). The HSSS shows a strong positive strain rate sensitivity on the yield strength. With increasing impact stress up to about 6 GPa the spall strength is found to decrease significantly and then levels off with further increasing impact stress. This trend is proposed to be attributed to the accumulation damage within the target as the initial shock-induced compression wave propagates through the target. The microcracks are clearly observed to nucleate from the interfaces between gamma-austenite and B2 phase and propagate along the interfaces or cut through the B2 phase in the HSSS during the spalling process. The Hugoniot elastic limit and the spall strength were found to be highly dependent on the microstructure. The spall strength was found to be higher when the density of the void nucleation sites is lower indicating that the spall strength should be a microstructure parameter of the HSSS under impact tensile conditions depending on the density of phase interfaces. It was also found that there is a tradeoff between the specific yield strength and the spall strength for this HSSS; thus the current findings should provide insights for achieving an optimal combination of both mechanical properties for impact-resistant applications by tailoring the microstructure. Published by AIP Publishing.
类目[WOS]	Physics, Applied
研究领域[WOS]	Physics
关键词[WOS]	INDUCED PLASTICITY STEELS ; VOID GROWTH ; STRAIN-RATE ; DUCTILE FRACTURE ; ALLOY STEELS ; MODEL ; COMPRESSION ; DAMAGE ; SOLIDS ; DEFORMATION
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000398636600041
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/60568]
专题	力学研究所_非线性力学国家重点实验室
推荐引用方式 GB/T 7714	Wang W,Zhang HS,Yang MX,et al. Shock and spall behaviors of a high specific strength steel: Effects of impact stress and microstructure[J]. JOURNAL OF APPLIED PHYSICS,2017,121(13).
APA	Wang W,张虎生,杨沐鑫,姜萍,袁福平,&武晓雷.(2017).Shock and spall behaviors of a high specific strength steel: Effects of impact stress and microstructure.JOURNAL OF APPLIED PHYSICS,121(13).
MLA	Wang W,et al."Shock and spall behaviors of a high specific strength steel: Effects of impact stress and microstructure".JOURNAL OF APPLIED PHYSICS 121.13(2017).