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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, a parametric study was carried out to extend the previous work to different contact friction conditions, and closed form universal functions, for various contact conditions, that relate elasto-plastic properties (Young's modulus, yield strength, and power law hardening exponent) to steady state frictional sliding response (scratch hardness, pile-up height and overall sliding frictional coefficient).
93 citations
TL;DR: In this article, the Bergstrom model is used to model the flow stress of Al-Mg alloys up to 200 °C and medium strain rates, and it is shown that the Bergström model is able to model flow stress up to 20 °C with moderate strain rates.
93 citations
TL;DR: In this paper, the authors analyzed the radiation-induced increase in yield stress, Δ σ YS, was expressed in the form of a power law, where h and n are the regression coefficients and dpa is displacements per atom.
93 citations
TL;DR: In this paper, the aging behavior of JIS SCS14A cast duplex stainless steels was investigated on the basis of the mechanical properties and microstructural changes during accelerated aging at 350°C and 400°C.
93 citations
TL;DR: In this paper, the authors developed the ultrafine-grained 2024 aluminum alloy (A2024) and A2024 matrix composites containing carbon nanotubes (CNTs) and employed three strengthening strategies of grain boundary hardening, age hardening and hardening by CNTs.
Abstract: The ultrafine-grained 2024 aluminum alloy (A2024) and A2024 matrix composites containing carbon nanotubes (CNTs) are developed. Three strengthening strategies of grain boundary hardening, age hardening and hardening by CNTs are employed. First, grain size of A2024 is effectively reduced using a ball-milling technique and A2024 with a grain size of 100 nm exhibits a yield stress of ∼560 MPa, exhibiting a well agreement with the Hall–Petch relation. CNTs also have a great effect for strengthening. The A2024 matrix composite containing 3 vol.% CNTs shows a yield stress of ∼780 MPa with 2% tensile elongation to failure. Hardness is further increased after aging. The nanostructured composite shows its peak hardness after 4 h of aging because the refined grain boundaries and CNTs act as a pathway for diffusion of atoms with stimulating the aging process. The composite in the present study has great potential for application as structural materials in industry.
93 citations