| 高强度榴弹钢的破片机理研究 |
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| 引用本文： | 董瀚,陈南平.高强度榴弹钢的破片机理研究[J].爆炸与冲击,1996,16(4):367-372. |
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| 作者姓名： | 董瀚 陈南平 |
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| 作者单位： | [1]冶金工业部钢铁研究总院 [2]清华大学 |
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| 摘 要： | 对高强度榴弹钢５０ＳｉＭｎＶＢ和５８ＳｉＭｎ的破片机理进行了研究。破片的表面形貌和组织变化表明，在初始阶段，榴弹内壁破片裂纹沿法线与半径方向呈／４夹角的平面绝热剪切而形成。５０ＳｉＭｎＶＢ钢的晶界弱化使其临界绝热剪切应变小于５８ＳｉＭｎ钢，从而表现出两者破片质量分布的差异。
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| 关 键 词： | 榴弹钢 破片机理 绝热剪切 |
FRACTURE BEHAVIOUR OF BOMB CASINGS OF HIGH STRENGTH STEEL |
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| Dong Han, Li Guifen, Chen Nanping.FRACTURE BEHAVIOUR OF BOMB CASINGS OF HIGH STRENGTH STEEL[J].Explosion and Shock Waves,1996,16(4):367-372. |
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| Authors: | Dong Han Li Guifen Chen Nanping |
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| Abstract: | The fracture behaviour exibited by tubular bomb casings of high strength 50SiMnVB and 58SiMn steel was investigated in consideration of fragment distribution,shear deformation and adiabatic shear instability. It is shown by the result that adiabatic shear deformation occurs at the interior surface of the casing in the plane of maximum shear stress under high explosive detonation pressure. Grain boundary weakness due to boron segregation in 50SiMnVB steel leads to its critical strain for adiabatic shearing being smaller than that presented by 58SiMn steel ,and eventually brings about discrepency between 50SiMnVB steel and 58SiMn steel in the distribution of fragment weight. |
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| Keywords: | ss: bomb casing steel fracture behaviour adiabatic shearing |
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