RELATIONSHIP BETWEEN M-A CONSTITUENT AND CLEAVAGE FRACTURE BEHAVIOUR OF GRANULAR BAINITIC WELD METAL

Abstract

Abstract: The cleavage fracture mechanism of granular bainitie weld metal in 15MnVN steel has been investigated.SEM observation of a special specimen for revealing simultaneously fracture sur- face and microstructure shows that the cleavage of the weld is initiated by M-A constituent. The 95th percentile equivalent diameter of M-A constituent controls the cleavage fracture stress of the weld metal.

Key words: granular bainite, M-A constituent, weld, cleavage fracture

XU Xiangxing SU Yi ZHOU Wei Tsinghua University,Beijing,ChinaCAI Qigong Central Iron and Steel Research Institute,Ministry of Metallurgical Industry,Beijing,China XU Xiangxing,Dept.of Mechanical Engineering,Tsinghua University,Beijing,100084,China. RELATIONSHIP BETWEEN M-A CONSTITUENT AND CLEAVAGE FRACTURE BEHAVIOUR OF GRANULAR BAINITIC WELD METAL[J]. Acta Metallurgica Sinica (English Letters), 1989, 2(2): 143-146.

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RELATIONSHIP BETWEEN M-A CONSTITUENT AND CLEAVAGE FRACTURE BEHAVIOUR OF GRANULAR BAINITIC WELD METAL

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