OS2016 微細マーカー法によるLPSO型マグネシウム合金における不均一塑性変形解析(OS20-3 チタンおよびLPSO型マグネシウム合金,OS-20 HCP金属の実験力学と計算力学)

概要

論文の詳細を見る
Inhomogeneous deformation in a dual-phase magnesium alloy with the long period stacking order (LPSO) phase has been investigated using high-precision markers drawn by electron beam lithography. Mg alloys containing Zn and rare earth elements such as Y have a characteristic microstructure consisting of the LPSO phase and the usual hcp matrix phase. Mechanical properties of this alloy are remarkably improved by the process of warm-extrusion at 623K. Such superior mechanical properties of this Mg alloy should be closely related to the characteristic of microstructural inhomogeneity induced by plastic deformation. The distribution of local equivalent strain due to tensile deformation was obtained by employing the high-precision marker method, where relatively large localized plastic strain appeared near the grain boundaries in the matrix. In addition, local shear deformation was observed in both LPSO phase and non-recrystallized region of the matrix. The effects of such inhomogeneous deformation on the high mechanical performance of the present Mg alloy are discussed.
一般社団法人日本機械学会の論文
2011-07-16