Topic
Hardening (metallurgy)
About: Hardening (metallurgy) is a research topic. Over the lifetime, 25584 publications have been published within this topic receiving 376012 citations.
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TL;DR: In this paper, the cyclic deformation behavior of extruded magnesium alloy Mg-3%Al-1%Zn (AZ31) was studied under plastic strain amplitude and stress amplitude-control at room temperature.
151 citations
151 citations
Journal Article•
TL;DR: In this article, the formultion of a viscoplastic constitutive model describing both cyclic hardening and cyclic softening under proportional and non-proportional loading conditions is investigated.
Abstract: The present paper is concerned with the formultion of a viscoplastic constitutive model describing both cyclic hardening and cyclic softening under proportional and nonproportional loading conditions. First a nonproportionality parameter and the relevant internal structural tensor to describe the nonproportional hardening is discussed in detail. Internal variables and the related evolution equations to describe the amplitude dependence of cyclic hardening/softening are also examined. Then the history effects of cyclic hardening and softening are considered in the evolution equations of isotropic hardening variable. The proposed model is established by incorporating these equations into Chaboche model
150 citations
TL;DR: In this article, the deformation behavior of a harmonic structured material (HSM), core-shell 304L stainless steel, was investigated using micro-digital image correlation (micro-DIC).
Abstract: Deformation behavior of a harmonic structured material (HSM), core–shell 304L stainless steel, is investigated using micro-digital image correlation (micro-DIC). High strain-partitioning between co...
150 citations
25 Nov 2009-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this paper, a modified constitutive model based on the Zerilli-Armstrong model has been proposed for considering the effects of thermal softening, strain rate hardening and isotropic hardening as well as the coupled effects of temperature and strain and of strain rate and temperature on flow stress.
Abstract: The experimental stress–strain data from isothermal hot compression tests over a wide range of temperatures (1073–1473 K), strains (0.1–0.5) and strain rates (0.001–1 s−1) were employed to formulate a suitable constitutive model to predict the elevated-temperature deformation behaviour in a Ti-modified austenitic stainless steel (alloy D9). It was observed that the Johnson–Cook (JC) model in its original form is inadequate to provide good description of flow behaviour of alloy D9 in the above hot working domain. This has been attributed to the inadequacy of the JC model to incorporate the coupled effects of strain and temperature and of strain rate and temperature. A modified constitutive model based on the Zerilli–Armstrong model has been proposed for considering the effects of thermal softening, strain rate hardening and isotropic hardening as well as the coupled effects of temperature and strain and of strain rate and temperature on flow stress. The proposed modified constitutive model could predict the elevated-temperature flow behaviour of alloy D9 over the specified hot working domain of alloy D9 with good correlation and generalization.
150 citations