Hall-Petch relation and grain boundary slipping in Al-Mg-Sc alloys with fine equiaxed grain structure

作者：Zhang, L.; Liu, C. Y.^*; Xie, H. Y.

来源：Materials Characterization, 2022, 194: 112472.

DOI：10.1016/j.matchar.2022.112472

• Al
• Mg
• Sc alloy
• Friction stir processing
• Hall
• Petch relationship
• Damping capacity

Al-Mg-Sc alloys with fine equiaxed grain structure and free of Mg segregation and dislocations were fabricated by friction stir processing and post-solution treatment to study the deformation behavior of Al-Mg base alloys at room and elevated temperatures. The k-value in the Hall-Petch equation of the alloys increased with increasing Mg content, and the equation of k-values and Mg content was displayed. Grain refinement and high Mg content not only could reduce the grain boundary (GB) sliding temperature of Al-Mg-Sc alloys during elevated-temperature deformation but also enhance their high-temperature GB sliding capacity.

• 单位
  桂林理工大学