第4期 刘继雄等：钛钢复合板弯曲过程的扫描电镜原位观察 ·427· (b) -200μm 50m (e) (d) 一200m -50um 图4爆炸钛钢复合板爆炸方向取样内弯的扫措电镜照片.(a),(b)裂纹萌生：(c),()裂纹扩展 Fig.4 SEM images of the exploding elad plate in the direction of explosion in intemal bending:(a)and (b)crack initiation:(e)and (d)crack propagation (b) -200m 一50m (e) (d) -50um -50um 图5爆炸钛钢复合板爆炸方向取样外弯的扫描电镜照片.(a),(b)裂纹萌生：()，(d)裂纹扩展 Fig.5 SEM images of the exploding clad plate in the direction of explosion in external bending:(a)and (b)crack initiation;(c)and (d)crack propagation第 4 期 刘继雄等: 钛钢复合板弯曲过程的扫描电镜原位观察 图 4 爆炸钛钢复合板爆炸方向取样内弯的扫描电镜照片． ( a) ，( b) 裂纹萌生; ( c) ，( d) 裂纹扩展 Fig． 4 SEM images of the exploding clad plate in the direction of explosion in internal bending: ( a) and ( b) crack initiation; ( c) and ( d) crack propagation 图 5 爆炸钛钢复合板爆炸方向取样外弯的扫描电镜照片． ( a) ，( b) 裂纹萌生; ( c) ，( d) 裂纹扩展 Fig． 5 SEM images of the exploding clad plate in the direction of explosion in external bending: ( a) and ( b) crack initiation; ( c) and ( d) crack propagation ·427·