4043 難燃性マグネシウム合金の切欠き材の疲労強度について(S19-2 マグネシウム合金の強度,S19 高機能マグネシウム合金の材料強度特性)

概要

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Rotating bending fatigue tests were carried out to investigate fatigue strength and notch sensitivity of notched specimens of non-combustible magnesium alloy, AMX602B(X=Ca). The fatigue strength and notch sensitivity of AMX602B(X=Ca) were compared with that of age-hardened aluminum alloy, 6061-T6 and commercial purity titanium, TP28. These materials were about the same tensile strength. It was clarified that the critical stress for crack initiation of AMX602B(X=Ca) was the same as that of 6061-T6 and lower than that of TP28. The threshold stress for crack propagation of AMX602B(X=Ca) was lower than that of 6061-T6. The notch root radius ρ_0 at the branch point of AMX602B(X=Ca) was 0.02〜0.05mm and was much lower than that of 6061-T6(ρ_0=0.4). The notch sensitivity of AMX602B(X=Ca) was high and the same as that of 6061-T6.
社団法人日本機械学会の論文
2006-09-15