Deformation twins in oriented, columnar-grained tungsten rod ballistic penetrators
Deformation twins in oriented, columnar-grained tungsten rod ballistic penetrators
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DOI：
10.1016/s0921-5093(00)01280-6
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发表时间：
2001-01
期刊：
影响因子：
6.4
通讯作者：
S. Pappu;S. Sen;L. Murr;D. Kapoor;L. Magness
中科院分区：
文献类型：
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作者：
S. Pappu;S. Sen;L. Murr;D. Kapoor;L. Magness
用透射电子显微镜和选区电子衍射方法，在[001]、[011]和[111]柱状晶钨杆弹道侵彻体的轧制均质装甲靶板上，发现了与{211}面痕迹相一致的变形孪晶。这些孪晶与光学金相观察到的诺依曼带一致。此外，孪晶密度似乎增加在头部的弹丸和孪晶被观察到符合流动的特点，其特征在于由动态恢复和再结晶提供的流动机制。由于变形孪晶似乎在柱状和单晶钨棒流中起着重要作用，并且孪晶受到晶粒尺寸的限制，烧结或多晶钨或钨合金穿透器不能像单晶穿透器那样执行，穿透器策略可能需要专注于诱导孪晶或开发超塑性行为。
Deformation twins coincident with traces of {211} planes in sections cut from [001], [011], and [111] columnar-grained tungsten rod ballistic penetrators in rolled homogeneous armor targets have been identified by transmission electron microscopy and selected-area electron diffraction. These twins have been shown to coincide with Neumann bands observed by optical metallography. In addition, the twin density appears to increase at the head of the projectile and twins are observed to coincide with flow features which are characterized by dynamic recovery and recrystallization which provide the flow mechanism. Since deformation twins appear to play a prominent role in columnar and single-crystal tungsten rod flow, and twinning is limited by grain size, sintered or polycrystalline tungsten or tungsten alloy penetrators cannot be expected to perform like single crystal penetrators and penetrator strategies may need to focus on inducing twinning or in developing superplastic behavior.