当前位置: X-MOL 学术J. Mater. Eng. Perform. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Microstructure Evolution and Mechanical Properties of AQ80 Alloy During Forward Extrusion and Twist Deformation
Journal of Materials Engineering and Performance ( IF 2.3 ) Pub Date : 2020-09-15 , DOI: 10.1007/s11665-020-05104-1
Xiaoye Liu , Liwei Lu , Min Ma , Wei Kang , Bo Che , Yong Xue

A new severe plastic deformation technique, forward extrusion and twist deformation, was adopted to manufacture magnesium (Mg) alloys at different temperatures. The microstructure evolution and mechanical properties of extruded AQ80 alloy were investigated. The strain distribution in FETD extrusion was simulated with finite element simulation software. The extruded samples exhibit finer grain sizes, weaker basal textures, higher recrystallized volume fractions and higher strengths than the traditional forward extrusion samples. This technology can refine the microstructure and improve the mechanical properties of Mg alloys. At lower temperatures, the grain size is smaller with a finer second phase, which is detected as Mg17AL12. Mg17AL12 has a particle-stimulated nucleation effect and a retarding effect on grain growth, resulting in much finer DRXed grains. Due to the effects of fine-grained strengthening and second phase strengthening, the strength and elongation of AQ80 alloy can be improved significantly.



中文翻译:

AQ80合金向前挤压和扭曲变形的组织演变和力学性能。

采用了一种新的严重塑性变形技术,即向前挤压和扭曲变形,以在不同温度下制造镁(Mg)合金。研究了挤压型AQ80合金的组织演变和力学性能。用有限元模拟软件模拟了FETD挤压中的应变分布。与传统的前向挤出样品相比,挤出样品具有更细的晶粒尺寸,更弱的基础组织,更高的重结晶体积分数和更高的强度。该技术可以改善镁合金的显微组织并改善其机械性能。在较低的温度下,晶粒尺寸较小,且具有更细的第二相,被检测为Mg 17 AL 12。镁17 AL 12具有颗粒刺激的成核作用和对晶粒生长的延迟作用,从而产生了更细的DRX晶粒。由于细化强化和第二相强化的作用,AQ80合金的强度和伸长率可以得到显着提高。

更新日期:2020-09-16
down
wechat
bug