Fracture and ballistic-induced phase transformation in tempered martensitic low-carbon armour steels

被引:31
|
作者
Maweja, Kasonde [1 ]
Stumpf, Waldo [1 ]
机构
[1] Univ Pretoria, Dept Mat Sci & Met Engn, ZA-0002 Pretoria, South Africa
基金
新加坡国家研究基金会;
关键词
ballistic impact; twinned martensite; martensite plate interfaces; retained austenite; grain boundaries;
D O I
10.1016/j.msea.2006.06.033
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Plates with thicknesses of 4.5 and 5.2 nun (reduced from current designs of 6 to 8 mm) of various experimental armour steels were tested according to the standard ballistic test of 5.56 turn rounds fired at a muzzle velocity of 940 +/- 10 m/s from a distance of 30 m. The fracture mechanism and phase transformation in various radial zones in and around the impacted areas were investigated by SEM, TEM and XRD. The resistance to ballistic perforation could be correlated directly with the microstructure and its changes upon ballistic impact. The roles of retained austenite, twinned plate martensite interfaces and grain boundaries in determining ballistic performance are explained. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码:158 / 169
页数:12
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