Dynamic Mechanical Behavior and Hypervelocity Impact Performance of an Al-Based Nanocrystalline Alloy

被引：0

作者：

ShanShan Deng ^{[1
]}

Gang Wang ^{[2
]}

RunQing Chi ^{[1
]}

BaoJun Pang ^{[1
]}

DongJun Wang ^{[1
,3
,4
]}

Jun Shen ^{[1
,5
]}

机构：

[1] School of Materials Science and Engineering,Harbin Institute of Technology

[2] Laboratory for Microstructures,Institute of Materials,Shanghai University

[3] National Key Laboratory for Precision Hot Processing of Metals,Harbin Institute of Technology

[4] Key Laboratory of Micro-Systems and Microstructures Manufacturing,Ministry of Education

[5] School of Materials Science and Engineering,Tongji University

来源：

ActaMetallurgicaSinica(EnglishLetters) | 2017年 / 30卷 / 12期

关键词：

Nanostructure material; Sintering; Mechanical properties; Computer simulation; Spacecraft shielding;

D O I：

暂无

中图分类号：

TG146.21 [];

学科分类号：

080502 ;

摘要：

In a wide strain rate range from 10-5to 10～3s-1,the deformation behavior of an Al-based nanocrystalline alloy was investigated.After fracture,the debris collected was used for statistical analysis,which is expected to reflect the profile of the fracture behavior of the alloy.The energy absorption of alloy at different strain rates was elucidated on account of mass distribution of debris.Based on the parameters obtained by the compression experiment at different strain rates,the numerical simulation experiment was carried out to evaluate the performance of Al-based nanocrystalline alloy as spacecraft shielding.The results suggest that Al-based nanocrystalline alloys have better shield performance than aluminum alloy under the identical areal density at velocity of 1–7 km/s.The better shield performance is attributed to high fracture strength,high hardness and low toughness of Al-based nanocrystalline alloy as compared with those of aluminum alloy.

引用

页码：1169 / 1176

页数：8

共 4 条

[1]

A constitutive model and data for metals subjected to large strains, high strain rates and high temperatures. Johnson GR, Cook WH. Proceedings of the Seventh International Symposium on Ballistics . 1983

[2]

M.Lambert. Advances in Space Research . 1997

[3]

Lawrence Livermore National Laboratory. D.Steinberg. Lawrence Livermore National Laboratory . 1996

[4]

B.J.Yang,J.H.Yao,J.Zhang,H.W.Yang,J.Q.Wang,E.Ma. Scripta Materialia . 2009

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