Estimation of the Yield Stress of Stainless Steel from the Vickers Hardness Taking Account of the Residual Stress

Abstract

In this paper, a method that uses the Vickers hardness to estimate the yield stress of a metallic material with taking account of residual stress is proposed. Although the yield stress of bulk metal can be evaluated by a tensile test, it cannot be applied to local yield stress varied by surface modification methods, such as the peening technique which introduces high compressive residual stress at the surface. Therefore, to evaluate the local yield stress employing a relatively easy way, the Vickers hardness test was conducted in this paper. Since the Vickers hardness depends on both the residual stress and the yield stress, the relationship between the residual stress and the Vickers hardness was experimentally examined. It was concluded that the yield stress of the surface treated by several peening techniques can be estimated from the Vickers hardness once this has been corrected for residual stress.

On the representative strain in Vickers hardness testing of 7010 aluminum alloy

“…Combining Eqs. (4) and (5), we obtain [12] (6) is consistent with the results in the literature [12][13][14][15][16][17][18][19][20][21] because the linear relationship between s Y and Vickers hardness consistently yielded a negative intercept in specimens that work harden during tensile deformation. In other words, the strain at the yield strength is consistently lower than the representative strain.…”

Austenitic stainless steel strengthened by the in situ formation of oxide nanoinclusions

“…The relation between YS and hardness is well established in literature. 25,26 In ODS LM samples (S1 and S2) the well dispersed spherical oxide nanoinclusions in the steel matrix together with the nature of laser melted steel 27 that has a high dislocation density and ne grains, result in higher YS and hardness compared to conventionally cast steel.…”

Imprecise knowledge based design and development of titanium alloys for prosthetic applications

“…The samples are subjected to micro-vickers for measuring the yield strength in Leco Micro hardness Tester LM 100. The yield strength of the samples are calculated from the following equation [57].…”