Deformation behavior of Mg-alloy-based composites at different temperatures studied by neutron diffraction

详细信息    查看全文

• 作者：Gergely Farkas^a ; ^b ; Kristian Má ; this^a ; Já ; n Pilch^b ; Peter Miná ; rik^a ; Petr Luká ; &scaron ; ^b ; Alexei Vinogradov^c ; ^d ; ^{alexei.vinogradov@ntnu.no}
• 关键词：Magnesium alloy matrix composites ; Neutron diffraction ; Deformation ; Twinning
• 刊名：Materials Science and Engineering: A
• 出版年：2017
• 出版时间：8 February 2017
• 年：2017
• 卷：685
• 期：Complete
• 页码：284-293
• 全文大小：2819 K
• 卷排序：685

文摘

The influence of the reinforcement short Saffil fibers on the deformation behavior of Mg-Al-Ca alloy-based composite with two different fiber plane orientations is investigated and clarified using in-situ neutron diffraction at room and elevated temperatures. The measured lattice strain evolution points to a more efficient reinforcing effect of fibers at parallel fiber plane orientation, which decreases at elevated temperature. A significant decrement of compressive lattice strain was incidentally observed in the matrix in the direction of load axis when deformation due to the elevated temperature occurred. Electron microscopy revealed the influence of the temperature and fiber orientation on fiber cracking. The EBSD observations corroborated neutron diffraction results highlighting significant twin growth at elevated testing temperatures