Analysis of rotation and residual strain in a single crystal under bending load using synchrotron radiation transmission Laue method

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K04065
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 18010:Mechanics of materials and materials-related
• Research Institution: Kitami Institute of Technology
• Principal Investigator: Yoshida Yutaka 北見工業大学, 工学部, 教授 (30626122)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: 放射光 / 白色Ｘ線 / 単結晶 / 残留ひずみ / 透過型電子顕微鏡

Outline of Final Research Achievements

In this study, we reported the crystal rotation and strain distribution in AZ31B magnesium (Mg) alloy after the four-point bending test using synchrotron radiation white X-rays, and the detail of deformation from microstructural analysis using a transmission electron microscope. In addition, the sequential measurement of the rotation and strain in Mg single crystals during the four-point bending test were performed by synchrotron radiation transmission Laue method. Furthermore, we developed a four-point bending equipment for sequential measurement and presented the results by scanning electron microscopy/electron back scatter diffraction. It confirmed that these evaluation techniques are useful for the ductile damage evaluation of Mg alloys.

Free Research Field

材料強度学

Academic Significance and Societal Importance of the Research Achievements

Mg系材料は、構造用の金属材料として最軽量であることから家電、自動車および医療の分野において、実用化が期待されているが、Mg系材料は特殊な結晶の回転からなる変形挙動がみられるため材料内部の残留ひずみ分布が複雑となる。材料破壊の観点からプレス加工などにおいて、材料内部の残留ひずみを把握することが重要である。本研究成果はMg加工精度の向上に寄与すると考えられる。