对经过内部爆破加载后产生的U-Nb合金破片进行了断口形貌、金相组织等微观分析.结果表明:U-Nb合金在爆炸加载下的断裂方式为剪切断裂;破片组织内部发现因高速应变引起的大量的绝热剪切带,靠近绝热剪切带的基体晶粒发生明显的拉长变形;破片中存在大量的微裂纹,裂纹沿着绝热剪切带扩展,当与沿壳体环向的拉应力形成的纵向主裂纹相交汇时,形成破片.
参考文献
| [1] | Taylor G I .The Fragmentation of Tubular Bombs[D].UK:Cambridge University Press,1993. |
| [2] | Hoggatt C R .[J].Journal of Applied Physics,1968,39:1856. |
| [3] | Grady D E;Hightower M M .Fracture of 4140 Steel Cylinder under High Explosive Loading[R].Sandia National Laboratories Report,Sand-90-0882C,1990. |
| [4] | Warren D R .Strain Rate Dependent Deformation and Fracture of Titanium Alloy Cylinders under Explosive Loading Conditions[R].US Department of Energy Report,AD-A268811,1993. |
| [5] | Martineau RL.;Smith FW.;Anderson CA. .Expansion of cylindrical shells subjected to internal explosive detonations[J].Experimental Mechanics,2000(2):219-225. |
| [6] | Willis Mock Jr;William H Holt .[J].Journal of Applied Physics,1983,54(05):2344. |
| [7] | 刘小萍;周益民;王春奎 et al.[J].金属学报,1994,30(04):A181. |
| [8] | 杨扬,程信林.绝热剪切的研究现状及发展趋势[J].中国有色金属学报,2002(03):401-408. |
| [9] | J J伯克;et al;石琪.铀合金物理冶金[M].北京:原子能出版社,1983:218. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%