Application of High-Pressure Sliding for Grain Refinement of Al and Mg Alloys

摘要：

An earlier study showed that high-pressure sliding (HPS) is effective for grain refinement of pure Al in a rectangular sheet form using the principle of high-pressure torsion. In this study, the HPS is applied for grain refinement of an Al-3% Mg-0.2%Sc alloy and an AZ61 Mg alloy. HPS was conducted under a pressure of 1 GPa with sliding distances of 10 to 30 mm at room temperature for the Al alloy and at 473 K. for the Mg alloy The average grain size is ~300 run for both the Al and Mg alloys, respectively. Tensile tests showed that a superplastic elongation of~1500% is achieved in the Al-3%Mg-0.2%Sc alloy at 573 K with an initial strain rate of 3.3xl0-3 s-1 and of~600% in the AZ61 alloy at 573 K with an initial strain rate of 1×10-3 s-1.

作者: Kiyonari Tazoe Shuji Honda Zenji Horita

作者单位: Department of Materials Science and Engineering,Kyushu University,Fukuoka 819-0395,Japan

会议类型: 国际会议

会议名称: 5th International Conference on Nanomaterials by Severe Plastic Deformation(第五届剧烈塑性变形纳米材料国际会议)

会议地点: 南京

会议语种:英文

页码: 91-96

在线出版日期: 2011-03-01（万方平台首次上网日期，不代表论文的发表时间）