Continuous and discontinuous yielding behaviors in ferrite-cementite steels

Abstract This paper describes the influence of rate of strain and temperature on the yield stresses of mild steel. Tensile tests are reported for room temperature, 200, 400, and 600 C, at rates of strain which vary from 10−8 to 103 per sec. The results of these tensile tests are plotted to show more clearly the effects of strain-aging on the yield stresses and ultimate stress. The comparison of the yield stress at various strain rates permits an analysis of the influence of strain. The conditions necessary for discontinuous yielding are described and compared with test experiences.

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The origin of discontinuous yielding in Mg alloys under slip-dominated condition studied by in-situ synchrotron diffraction and elastic-viscoplastic self-consistent modeling

Materials Science and Engineering A ◽

10.1016/j.msea.2019.03.073 ◽

2019 ◽

Vol 754 ◽

pp. 562-568 ◽

Cited By ~ 2

Author(s):

Y.Q. Chi ◽

X.H. Zhou ◽

C. Xu ◽

D. Sun ◽

X.G. Qiao ◽

...

Keyword(s):

Mg Alloys ◽

Synchrotron Diffraction ◽

Self Consistent ◽

Discontinuous Yielding

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Discontinuous Yielding in High Temperature Deformation of Ti-5553 Alloy

Rare Metal Materials and Engineering ◽

10.1016/s1875-5372(16)30032-7 ◽

2015 ◽

Vol 44 (10) ◽

pp. 2415-2418 ◽

Cited By ~ 4

Author(s):

Zhou Wei ◽

Ge Peng ◽

Zhao Yongqing ◽

Li Qian ◽

Xin Shewei ◽

...

Keyword(s):

High Temperature ◽

High Temperature Deformation ◽

Temperature Deformation ◽

Discontinuous Yielding

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Discontinuous yielding in Ni-base superalloys during high-speed deformation

Materials Science and Engineering A ◽

10.1016/j.msea.2014.10.041 ◽

2015 ◽

Vol 620 ◽

pp. 383-389 ◽

Cited By ~ 17

Author(s):

Z.L. Zhao ◽

Y.Q. Ning ◽

H.Z. Guo ◽

Z.K. Yao ◽

M.W. Fu

Keyword(s):

High Speed ◽

Discontinuous Yielding ◽

High Speed Deformation

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Comments on discontinuous yielding in age-hardened alloys

Materials Science and Engineering ◽

10.1016/0025-5416(71)90116-9 ◽

1971 ◽

Vol 7 (3) ◽

pp. 175-176

Keyword(s):

Discontinuous Yielding

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Modeling Stress Strain Curves for Nonlinear Analysis

Materials Science Forum ◽

10.4028/www.scientific.net/msf.575-578.539 ◽

2008 ◽

Vol 575-578 ◽

pp. 539-544 ◽

Cited By ~ 2

Author(s):

Hu Sheng Gao

Keyword(s):

Strain Curve ◽

Test Sample ◽

Sudden Onset ◽

Stress Strain ◽

Engineering Structures ◽

Nonlinear Stress ◽

Modeling Stress ◽

Discontinuous Yielding ◽

Lüders Band ◽

Yielding Point

Methods of modeling stress strain curves for nonlinear stress analysis are discussed in order to obtain comparable results between different finite element analysts and between different versions of designs. The most common method for modeling stress strain curves is to use Ramberg- Osgood equation. For materials with significant discontinuous yielding, Ramburg-Osgood approximation leads to some problems near discontinuous yielding point. Discontinuous yielding occurs when sudden onset of plastic deformation associated Luders band takes place in a uniform test sample. For engineering structures and machine components, the propagation of Luders band may not occur in deformation process because of non-uniform stress distribution caused by stress concentration, complicated loading condition etc. A modified Ramberg-Osgood method for modeling stress strain curve is proposed.

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