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 role of severe plastic deformation on the second-phase stability in a 6082 Al-Mg-Si alloy was studied using differential scanning calorimetry (DSC) and transmission electron microscopy (TEM) techniques.
Abstract: The role of severe plastic deformation on the second-phase stability in a 6082 Al-Mg-Si alloy was studied using differential scanning calorimetry (DSC) and transmission electron microscopy (TEM) techniques. The alloy was fully annealed prior to undergoing up to six equal channel angular pressing (ECAP) passes using route C. The Orowan strengthening mechanism was calculated on the basis of TEM inspections for the two hardening second-phase precipitates: Mg2Si and Si. The former had a major tendency to be cut and fragmented by dislocations, while in the latter, a dissolution process was induced by severe plastic deformation. Accordingly, the second-phase Si particles became progressively less effective with increasing deformation (i.e., additional ECAP passes). The increase in hardness with the ECAP passes was mostly due to the grain refining mechanism and to dislocation tangles within the newly formed grains. The expected, though if limited, contribution of second-phase hardening was prevalently accounted for by the Mg2Si particles.
100 citations
TL;DR: In this article, the authors reported that HDI hardening does not increase linearly with increasing strain gradient in the interface-affected zone, which is because some GND pileups may be absorbed by the interface and consequently does not contribute to the increase in strain gradient.
100 citations
TL;DR: In this paper, an elastic-plastic contact (EPC) solution and code was developed using a modified semi-analytical method and the indentation tests with different hardening behavior were simulated by using the developed EPC code.
Abstract: An elastic-plastic contact (EPC) solution and code is developed using a modified semi-analytical method. The indentation tests with different hardening behavior are simulated by using the developed EPC code. The distributions of contact pressure, residual stress and plastic strain are obtained and compared with the results of the finite element method models without hardening. Some techniques, such as fast Fourier transform and fast convergence method, are used to increase the computation speed.
100 citations
TL;DR: Nakamachi et al. as discussed by the authors developed two multi-scale analyses codes by combining a homogenization algorithm and an elastic/crystalline viscoplastic finite element (FE) method.
100 citations
TL;DR: In this paper, the effect of carbon on the yield stress and temperature dependence of yield stress from 300° to 20°K was investigated in high-purity iron single crystals of various orientations.
100 citations