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: It is shown that incorporating merely several atomic percent of Fe solutes into Al enables the formation of nanotwinned columnar grains with high-density 9R phase in Al(Fe) solid solutions.
Abstract: Light-weight aluminum (Al) alloys have widespread applications. However, most Al alloys have inherently low mechanical strength. Nanotwins can induce high strength and ductility in metallic materials. Yet, introducing high-density growth twins into Al remains difficult due to its ultrahigh stacking-fault energy. In this study, it is shown that incorporating merely several atomic percent of Fe solutes into Al enables the formation of nanotwinned (nt) columnar grains with high-density 9R phase in Al(Fe) solid solutions. The nt Al-Fe alloy coatings reach a maximum hardness of ≈5.5 GPa, one of the strongest binary Al alloys ever created. In situ uniaxial compressions show that the nt Al-Fe alloys populated with 9R phase have flow stress exceeding 1.5 GPa, comparable to high-strength steels. Molecular dynamics simulations reveal that high strength and hardening ability of Al-Fe alloys arise mainly from the high-density 9R phase and nanoscale grain sizes.
111 citations
TL;DR: More than 50% elongation of as-quenched martensite was achieved under uniaxial tensile loading using a multilayered structure combining martensitic and austenitic steel.
111 citations
TL;DR: In this article, a model was developed to predict the austenite flow curves of low alloy and microalloyed steels, consisting of two expressions for stress, as a function of strain, temperature, strain rate and the chemical composition of the steel.
111 citations
TL;DR: In this paper, two different techniques for measuring the strain-rate sensitivity exponent, m, of the power law relating the equivalent flow stress and the equivalent plastic strain rate are analyzed, paying special attention to the errors induced by the thermal drift rate and by the indentation-size effect.
111 citations
TL;DR: In this paper, the authors developed models for elastic-plastic, rate-independent materials with power-law strain hardening and considered the material as incompressible and compressible.
Abstract: We developed models for elastic-plastic, rate-independent materials with power-law strain hardening. The models considered the material as incompressible and compressible
111 citations