Bauschinger effect and residual phase stresses in two ductile-phase steels: Part II. The effect of microstructure and mechanical properties of the constituent phases on Bauschinger effect and residual phase stresses |
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Authors: | Li Zhonghua Gu Haicheng |
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Affiliation: | (1) Department of Engineering Mechanics and Re-search Institute for Strength of Metals, Xi’an Jiaotong University, Xi’an, People’s Republic of China |
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Abstract: | A finite-element method has been employed to calculate the effect of the prestrain, particle size, volume fraction, and yield
strength ratio of the constituent phases on the Bauschinger effect (BE) and residual phase stresses for ferrite-martensite
two-phase steels. The relationships be-tween the BE parameters and residual phase stresses are given, and the basics of inelastic
un-loading and the effect of reverse deformation on the BE and residual phase stresses are also discussed. Based on the decaying
of the residual phase stresses (commonly called “back stresses”) during reverse loading, the relationship between back stresses
and permanent softening has been elucidated. Some of the calculated results are compared with experimental ones, and good
agree-ment between them is found. |
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Keywords: | |
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