Structure, mechanical characteristics, and deformation and fracture features of quenched structural steel under static and cyclic loading after combined strain-heat nanostructuring treatment

被引：0
作者：
A. V. Makarov
R. A. Savrai
E. S. Gorkunov
A. S. Yurovskikh
I. Yu. Malygina
N. A. Davydova
机构：
[1] Russian Academy of Sciences,Institute of Engineering Science, Ural Branch
[2] Ural Federal University,undefined
来源：
Physical Mesomechanics | 2015年 / 18卷
关键词：
structural steel; combined strain-heat treatment; nanocrystalline structure; mechanical properties; low-cycle fatigue loading;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
In the work, we studied the special features of deformation and fracture of quenched steel 50 (0.51%) under static and cyclic tension after combined strain-heat nanostructuring treatment, which includes fictional treatment with subsequent tempering at 350°C. It is shown that the combined nanostructuring treatment of quenched steel 50 changes the character of plastic flow, making it more uniform, in the loaded material. Under static tension, this shows up as disappearance of the yield plateau early in the process, and under cyclic loading, as suppression of the deformation relief formed by shear and rotational deformation modes. Despite incipient cracks, the hardened surface layer thus escapes complete fracture throughout the fatigue loading and preserves its resistance to mechanical contact action.
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页码：43 / 57
页数：14
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