TY - GEN
T1 - Grain refinement of high-purity FCC metals using equal-channel angular pressing
AU - Horita, Zenji
AU - Kishikawa, Kaoru
AU - Kimura, Keiichi
AU - Tatsumi, Kohei
AU - Langdon, Terence G.
PY - 2007/1/1
Y1 - 2007/1/1
N2 - Equal-channel angular pressing (ECAP) is a valuable technique for refining grain sizes to the submicrometer or the nanometer range. This study explores the reason for the difference in the grain refining behavior between pure Al and pure Cu. First, very high purity levels were adopted in order to minimize any effects of impurities: 99.999% for Al and 99.99999% for Cu. Second, high purity (99.999%) Au was also used in order to examine the effect of stacking fault energy. All three pure metals were subjected to ECAP and microstructural observations and hardness measurements were undertaken with respect to the number of ECAP passes. It is concluded that the stacking fault energy plays an important role and accounts for the difference in the grain refining behavior in the ECAP process.
AB - Equal-channel angular pressing (ECAP) is a valuable technique for refining grain sizes to the submicrometer or the nanometer range. This study explores the reason for the difference in the grain refining behavior between pure Al and pure Cu. First, very high purity levels were adopted in order to minimize any effects of impurities: 99.999% for Al and 99.99999% for Cu. Second, high purity (99.999%) Au was also used in order to examine the effect of stacking fault energy. All three pure metals were subjected to ECAP and microstructural observations and hardness measurements were undertaken with respect to the number of ECAP passes. It is concluded that the stacking fault energy plays an important role and accounts for the difference in the grain refining behavior in the ECAP process.
KW - EBSD
KW - Equal channel angular pressing (ECAP)
KW - FCC metals
KW - Hardness
KW - Severe plastic deformation (SPD)
KW - Stacking fault energy
KW - Ultrafine grain sizes
UR - http://www.scopus.com/inward/record.url?scp=38149103090&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=38149103090&partnerID=8YFLogxK
U2 - 10.4028/0-87849-443-x.1273
DO - 10.4028/0-87849-443-x.1273
M3 - Conference contribution
AN - SCOPUS:38149103090
SN - 087849443X
SN - 9780878494439
T3 - Materials Science Forum
SP - 1273
EP - 1278
BT - Recrystallization and Grain Growth III - Proceedings of the Third International Conference on Recrystallization and Grain Growth, ReX and GG III
PB - Trans Tech Publications Ltd
T2 - 3rd International Conference on Recrystallization and Grain Growth, ReX GG III
Y2 - 10 June 2007 through 15 June 2007
ER -