Aging Behavior of Al-Mg-Si Alloys Processed by High-Pressure Torsion
This research investigates simultaneous strengthening by grain refinement and fine precipitation in age-hardenable Al-Mg-Si alloys containing an additional element of either Ag, Cu, Pt or Pd. The alloys were solution-treated and processed by high-pressure torsion (HPT) at room temperature under a pressure of 6 GPa. They were aged at a temperature of 373 K for up to a total period of 6.7 hours. Vickers microhardness was measured after selected periods of aging and the microstructures were observed by transmission electron microscopy. It was found that, in all alloys, the grain sizes after HPT were refined to 300-400 nm and there were significant increases in the hardness through the HPT processing. The hardness was further increased by the subsequent ageing treatment, confirming the simultaneous strengthening by grain refinement and fine precipitation. However, the aging behavior was different depending on the alloying compositions.
Daichi Akama Zenji Horita Kenji Matsuda Shoichi Hirosawa
Department of Materials Science and Engineering,Faculty of Engineering,Kyushu University,Fukuoka 819 Graduate School of Science and Engineering for Research,University of Toyama,Toyama 930-8555,Japan Department of Mechanical Engineering and Materials Science,Yokohama National University,Yokohama 240
国际会议
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)
南京
英文
259-264
2011-03-01（万方平台首次上网日期，不代表论文的发表时间）