This review paper provides an overview of the micropillar compression technique as applied to magnesium(Mg) and its alloys. It explores the influence of various factors, such as pillar size, shape, temperature, and st...This review paper provides an overview of the micropillar compression technique as applied to magnesium(Mg) and its alloys. It explores the influence of various factors, such as pillar size, shape, temperature, and strain rate on the mechanical properties of Mg.Additionally, the impact of alloying elements, aging, and precipitates in Mg alloys has been extensively examined, revealing their significant influence on mechanical performance. The study highlights the strength and strain hardening improvements in Mg with decreasing pillar size in micropillar compression. Furthermore, the role of precipitates as strengthening agents, affecting deformation mechanisms and overall mechanical response, is explored. These valuable insights are crucial for designing Mg-based materials with enhanced mechanical properties for advanced engineering applications.展开更多
Compression tests at room and high temperature and creep tests at high temperature have been performed on B2 Nb15A120V and Nb10Al20V alloys. At room temperature, in the as-cast state, both alloys exhibited significant...Compression tests at room and high temperature and creep tests at high temperature have been performed on B2 Nb15A120V and Nb10Al20V alloys. At room temperature, in the as-cast state, both alloys exhibited significant ductility in compression. The Burgers vectors of the dislocations were found to be 1/2<111>lipping on {112}. The dislocations showed good mobility. Dislocation clusters also triggered the formation of pseudotwins, which resulted in serrated yielding. In steady state creep, deformation occurred by a combination of dislocation glide and climb, giving a homogeneous mi-crostructure. The dislocations in NblOAl20V were determined to be 1/2(111) slipping on {110} with some <100>egments. After creep at 1100℃, Nb 15A120V showed a two phase structure with a few dislocations in the A15 phase but no dislocations in the A2 phase.展开更多
文摘This review paper provides an overview of the micropillar compression technique as applied to magnesium(Mg) and its alloys. It explores the influence of various factors, such as pillar size, shape, temperature, and strain rate on the mechanical properties of Mg.Additionally, the impact of alloying elements, aging, and precipitates in Mg alloys has been extensively examined, revealing their significant influence on mechanical performance. The study highlights the strength and strain hardening improvements in Mg with decreasing pillar size in micropillar compression. Furthermore, the role of precipitates as strengthening agents, affecting deformation mechanisms and overall mechanical response, is explored. These valuable insights are crucial for designing Mg-based materials with enhanced mechanical properties for advanced engineering applications.
文摘Compression tests at room and high temperature and creep tests at high temperature have been performed on B2 Nb15A120V and Nb10Al20V alloys. At room temperature, in the as-cast state, both alloys exhibited significant ductility in compression. The Burgers vectors of the dislocations were found to be 1/2<111>lipping on {112}. The dislocations showed good mobility. Dislocation clusters also triggered the formation of pseudotwins, which resulted in serrated yielding. In steady state creep, deformation occurred by a combination of dislocation glide and climb, giving a homogeneous mi-crostructure. The dislocations in NblOAl20V were determined to be 1/2(111) slipping on {110} with some <100>egments. After creep at 1100℃, Nb 15A120V showed a two phase structure with a few dislocations in the A15 phase but no dislocations in the A2 phase.
