表面層除去法によるX線破面解析法の検討(<小特集>X線材料強度小特集)

概要

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A new simplified technique was proposed on X-ray fractographic analysis of the fatigue fracture surface. The technique is based on the experimentally determined σ_r(Y) versus K_<max> relation, where σ_r(Y) is the residual stress on the fracture surface after the removal of a thin layer whose thickness is Y, and K_<max> is the applied stress intensity factor. It was found that σ_r(Y) is correlated with K_<max> under a fixed stress ratio by such an equation as, σ_r(Y)/σ_y=Q・K_<max>^q・(1-Y/ω_p)^2, where ω_p=α(K_<max>/σ_y)^2, and Q, and α are constants. The unknown value of K_<max> was found to be successfully estimated from the measurable single value of σ_r(Y) by the above equation. The proposed technique was tested for the fatigue surface which was made under a corrosive enviroment. The estimated value of K_<max> was in good accordance with the actual applied value.
社団法人日本材料学会の論文
1987-08-15