The fractograph exhibited typical ductile dimple fracture pattern.断裂形式呈韧性断裂,断口以韧窝为主.The toughness, fractograph and microstructure of the failed die specimens have been examined and analysed.检测了失效模具材料的微观组织 、 击韧性和断口形貌.The ...
陡斜的前积层只有在非常严格的条件下才能形成.Steeply tilted foreset beds are formed only under very restricted condition.顶积 、 前积和底积层均正常发育.Topset, foreset, and bottomset beds normally developed....