The fractograph exhibited typical ductile dimple fracture pattern.斷裂形式呈韌性斷裂,斷口以韌窩為主.The toughness, fractograph and microstructure of the failed die specimens have been examined and analysed.檢測了失效模具材料的微觀組織 、 擊韌性和斷口形貌.The ...
陡斜的前積層只有在非常嚴(yán)格的條件下才能形成.Steeply tilted foreset beds are formed only under very restricted condition.頂積 、 前積和底積層均正常發(fā)育.Topset, foreset, and bottomset beds normally developed....