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圓筒內(nèi)嵌鎢合金球爆炸加載條件下斷裂機(jī)制研究
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Fracture Mechanism of Tungsten Alloy Spheres Embedded in Cylinders under Explosive Loading
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    摘要:

    針對(duì)鎢合金作為預(yù)制破片戰(zhàn)斗部穿甲后的易碎性，采用圓筒內(nèi)嵌鎢合金球戰(zhàn)斗部，研究了97.5W-Ni-Fe合金在圓筒內(nèi)嵌式爆炸加載穿靶前后的微觀組織以及斷裂機(jī)制。結(jié)果表明，97.5W-Ni-Fe合金爆炸加載后在鎢顆粒內(nèi)部產(chǎn)生大量形變孿晶，穿透靶板后形變孿晶誘發(fā)大量微觀裂紋，微裂紋在穿靶后的拉應(yīng)力作用下擴(kuò)展并與W-W界面斷裂相互連接，使鎢合金球斷裂成有效破片，增強(qiáng)了鎢合金的二次毀傷能力。

    Abstract:

    Considering the brittleness of tungsten alloys as pre-fabricated fragment ammunition after armour-piercing, tungsten alloy spheres embedded in cylinders were employed; the microstructure and fracture mechanism of 97.5W-Ni-Fe alloy were investigated under explosive loading before and after armour-piercing. The results show that high strain rate explosive loading induces a large amount of deformation twins in tungsten particles. The twining deformation after armour-piercing induces lots of micro-cracks and these micro-cracks extend to connect with the W-W interface fracture, becoming macro-cracks due to the tensile stress. As a result, the tungsten alloy spheres are fractured to efficient fragments and the second damage ability is enhanced.

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王 星,李樹(shù)奎,王迎春,殷社萍.圓筒內(nèi)嵌鎢合金球爆炸加載條件下斷裂機(jī)制研究[J].稀有金屬材料與工程,2011,40(4):677~680.[Wang Xing, Li Shukui, Wang Yingchun, Yin Sheping. Fracture Mechanism of Tungsten Alloy Spheres Embedded in Cylinders under Explosive Loading[J]. Rare Metal Materials and Engineering,2011,40(4):677~680.]
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  • 收稿日期:2010-04-25
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