کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1579080 | 1514828 | 2010 | 6 صفحه PDF | دانلود رایگان |
Tungsten heavy alloy (WHA) rod penetrators processed by hot-hydrostatic extrusion and hot torsion (HE + HT) are subjected to ballistic impact, and the as-sintered and the as-extruded WHA rod penetrators are tested for comparison. The HE + HT WHA penetrators display the best penetration performance with the critical minimum penetration velocity decreasing more than 9% and 5% compared with the as-sintered and the as-extruded WHA penetrators, respectively. The remnants of the as-sintered and the as-extruded WHA penetrators exhibit obvious mushroom-like heads, but the remnants of HE + HT WHA penetrators maintain an acuate shape, indicating a good self-sharpening ability. Microstructure analysis shows that, adiabatic shear bands (ASBs) form at edges of the HE + HT WHA penetrator heads during the penetration process, and deformed parts of the penetrators fall off along the ASBs, which are responsible for the good self-sharpening ability and evidently improved penetration performance.
Journal: Materials Science and Engineering: A - Volume 527, Issues 18–19, 15 July 2010, Pages 4881–4886