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: The machining characteristics of TiNi shape memory alloys (SMAs) have been studied in this article, where the authors attributed the effects of strain hardening, fatigue hardening and high strain-rate hardening.
101 citations
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25 May 2008-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this paper, the influence of the parameters carbon content, temperature and total strain amplitude on the deformation-induced martensite formation in metastable 301 austenitic steel, hollow cylindrical fatigue specimens were carburized and decarburized in methane-hydrogen gas mixtures.
Abstract: To study the influence of the parameters carbon content, temperature and total strain amplitude on the deformation-induced martensite formation in metastable 301 austenitic steel, hollow cylindrical fatigue specimens were carburized and decarburized in methane–hydrogen gas mixtures. Fatigue experiments were carried out in a temperature range between RT and T = −100 °C while monitoring the fraction of deformation-induced martensite versus the number of cycles by means of a magneto-inductive ferrite sensor. The results show that deformation-induced martensite formation leads to pronounced cyclic hardening. A certain amount of accumulated plastic strain is necessary and a threshold value of the plastic strain amplitude must be exceeded to trigger martensitic transformation. The effect of the carbon content and/or the temperature on the formation of α′ martensite is very strong in such a way that high carbon concentrations and elevated temperatures stabilize the austenite phase.
101 citations
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TL;DR: In this paper, an elastic-plastic constitutive model including mixed isotropic-distortional hardening is presented, which is very simple and requires only experimental data that are part of the standard characterization of sheet metals.
100 citations
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TL;DR: In this paper, it was shown that AI-Cu-Mg-Ag alloys have a high response to hardening in the artificially aged condition and this effect is considered to arise because silver changes the ageing process occurring in the equivalent ternary Al-CuMg alloy and promotes precipitation of thin plates of a monoclinic form of the phase θ(CuAl2) on the matrix planes.
Abstract: Castings made from AI-Cu-Mg-Ag alloys have a high response to hardening in the artificially aged condition This effect is considered to arise because silver changes the ageing process occurring in the equivalent ternary Al-Cu-Mg alloy and promotes precipitation of thin plates of a monoclinic form of the phase θ(CuAl2) on the {111} matrix planes Replacing silver with cadmium also causes increased hardening, although the effect is less and arises from a refinement in the size of precipitates formed in the existing ageing process
100 citations
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TL;DR: In this paper, the authors simulated first wall sequential self-ion implantation up to 13 dpa followed by helium-ion insertion up to 3000 appm to produce damaged layers in pure tungsten.
Abstract: To simulate neutron and helium damage in a fusion reactor first wall sequential self-ion implantation up to 13 dpa followed by helium-ion implantation up to 3000 appm was performed to produce damaged layers of ∼2 μm depth in pure tungsten. The hardness of these layers was measured using nanoindentation and was studied using transmission electron microscopy. Substantial hardness increases were seen in helium implanted regions, with smaller hardness increases in regions which had already been self-ion implanted, thus, containing pre-existing dislocation loops. This suggests that, for the same helium content, helium trapped in distributed vacancies gives stronger hardening than helium trapped in vacancies condensed into dislocation loops.
100 citations