The Fracture of Tempered Martensite
The Fracture of Tempered Martensite
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回火马氏体的断裂
DOI：
10.2320/matertrans1960.9.343
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发表时间：
1968
影响因子：
1.2
通讯作者：
M. Ogasawara
中科院分区：
文献类型：
--
作者：
S. Matsuda;Tohru Inoue;M. Ogasawara
对低碳镍钢回火马氏体断口进行了观察。冲击试验数据与断裂表面和显微组织的细节相关。结果表明，解理微裂纹在大的铁素体晶粒中萌生，首先形成的大马氏体片;导致这些微裂纹最终解理断裂的主要因素是解理裂纹面的平均长度，其远大于马氏体针或片的宽度，并且随着原始奥氏体晶粒尺寸而显著变化。（1968年6月1日）
Observations were made on the fracture surface of tempered martensite of a low-carbon nickel steel. Impact test data were correlated with details of fracture surface and microstructure. It is shown that cleavage microcracks initiate in large ferrite grains, i.e., first-formed large martensite plates; the dominant factor leading to the ultimate cleavage fracture from these microcracks is the mean length of a cleavage crack facet, which is much larger than the width of martensite needles or plates and is varied considerably with the prior austenite grain size. (Received June 1, 1968)