TY - GEN
T1 - Enhancement of formability in magnesium alloy AZ31B via friction stir processing
AU - Sato, Y. S.
AU - Sasaki, A.
AU - Sugimoto, A.
AU - Honda, A.
AU - Kokawa, H.
PY - 2007
Y1 - 2007
N2 - Mg alloy has a poor formability at room temperature because of lack of the active slip systems, but the grain refinement improves its ductility. Friction stir processing (FSP) can create homogeneous microstructure consisting of fine grains in Mg alloys, thus it would be expected that FSP enhances the formability of Mg alloys. In this study, multi-pass FSP was applied to Mg alloy AZ31B, and then formability of FSPed alloy was evaluated. Multi-pass FSP produced the fine recrystallized grains in Mg alloy. The stir zone exhibited larger fracture limit major strains than the base material under uniaxial tension and plane strain deformation, and these values increased with decreasing grain size. The stir zone having grain size of 2.9 μm showed the fracture limit major strains which are roughly as same as those of an annealed pure Al. The present study suggests that FSP is an effective method to enhance the formability of Mg alloys.
AB - Mg alloy has a poor formability at room temperature because of lack of the active slip systems, but the grain refinement improves its ductility. Friction stir processing (FSP) can create homogeneous microstructure consisting of fine grains in Mg alloys, thus it would be expected that FSP enhances the formability of Mg alloys. In this study, multi-pass FSP was applied to Mg alloy AZ31B, and then formability of FSPed alloy was evaluated. Multi-pass FSP produced the fine recrystallized grains in Mg alloy. The stir zone exhibited larger fracture limit major strains than the base material under uniaxial tension and plane strain deformation, and these values increased with decreasing grain size. The stir zone having grain size of 2.9 μm showed the fracture limit major strains which are roughly as same as those of an annealed pure Al. The present study suggests that FSP is an effective method to enhance the formability of Mg alloys.
KW - Formability
KW - Friction stir processing
KW - Magnesium alloy
KW - Microstructure
UR - http://www.scopus.com/inward/record.url?scp=38349004973&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=38349004973&partnerID=8YFLogxK
U2 - 10.4028/0-87849-428-6.3775
DO - 10.4028/0-87849-428-6.3775
M3 - Conference contribution
AN - SCOPUS:38349004973
SN - 0878494286
SN - 9780878494286
T3 - Materials Science Forum
SP - 3775
EP - 3780
BT - Supplement to THERMEC 2006, 5th International Conference on PROCESSING and MANUFACTURING OF ADVANCED MATERIALS, THERMEC 2006
PB - Trans Tech Publications Ltd
T2 - 5th International Conference on Processing and Manufacturing of Advanced Materials - THERMEC'2006
Y2 - 4 July 2006 through 8 July 2006
ER -