MICROFRACTRUE MECHANISM OF TA2/A3 EXPLOSIVE CLADDING INTERFACE

来源期刊：中国有色金属学报(英文版)1995年第2期

论文作者：Yang Yang Zhang Xinming Li Zhenghua Li Qingyun

文章页码：113 - 119

Key words：microfracture ;mechanism ;explosive ;cladding ;interface

Abstract: In-situ SEM observations on the TA2/A3 explosive cladding interfaces had been performed to examine their microfracture behaviour. The important conclusions of the study were summarized as follows. The microfracture mechanism of explosive cladding TA2/A3 interface are:(1) microcracks initiate inside the swirls or inside the molten material as well as on the boundary between the molten material and the A3 matrix, which penetrate into the nearby A3 matrix in the direction normal to the tensile loading direction under the action of the cracktip stress field, (2) at the same time of the action of mechanism(1), microcracks initiate along the TA2/A3 interface,and link up under the tensile load. Terminal cleavage fracture takes place mainly in the recrystallized and grain abnormal growth region on the A3 side in the vicinity of TA2/A3 interface. No crack nucleation and propagation inside the adiabatic shear band (ASB) on the TA2 side were observed under the tensile load at room temperature.It ...更多is necessary to avoid the jetting molten material wrapped up in the swirl by controlling the collision parameters.