TY - GEN
T1 - Aging behavior of Al-Mg-Si alloys processed by high-pressure torsion
AU - Akama, Daichi
AU - Horita, Zenji
AU - Matsuda, Kenji
AU - Hirosawa, Shoichi
PY - 2011/2/25
Y1 - 2011/2/25
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=79951823186&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=79951823186&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/MSF.667-669.259
DO - 10.4028/www.scientific.net/MSF.667-669.259
M3 - Conference contribution
AN - SCOPUS:79951823186
SN - 9783037850077
T3 - Materials Science Forum
SP - 259
EP - 264
BT - Nanomaterials by Severe Plastic Deformation, NanoSPD5
T2 - 5th International Conference on Nanomaterials by Severe Plastic Deformation, NanoSPD5
Y2 - 21 March 2011 through 25 March 2011
ER -