Effect of matrix toughness and grain morphology on fracture of steels
Effect of matrix toughness and grain morphology on fracture of steels
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DOI：
10.1007/s11041-013-9565-0
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发表时间：
2013-03
影响因子：
0.6
通讯作者：
Ş. Atapek;S. Gümüş;Ş. Polat
中科院分区：
文献类型：
--
作者：
Ş. Atapek;S. Gümüş;Ş. Polat
研究了X42钢（09G2S型）和实验贝氏体钢（0.23% C, 0.18% Mn, 0.04% Ni, 2.35% Co, 1.40% Cr, 0.50% Mo, 0.08% Nb, 0.08% v, 0.02% Ti）淬火回火后的显微组织和断口形貌。确定了基体韧性对钢断裂性能的影响。结果表明，回火温度对断口韧性的影响较大，裂纹的形核和扩展与二次相的存在和晶粒形貌有关。
The microstructure and fracture surfaces of steel X42 (type 09G2S) and of an experimental bainitic steel (0.23% C, 0.18% Mn, 0.04% Ni, 2.35% Co, 1.40% Cr, 0.50% Mo, 0.08% Nb, 0.08%V, 0.02% Ti) are studied after quenching and tempering. The influence of the toughness of the matrix on the fracture behavior of the steels is determined. It is shown that the fracture toughness changes depending on the tempering temperature, and the nucleation and propagation of cracks depends on the presence of secondary phases and on the morphology of the grain structure.