TY - GEN
T1 - Microstructural evolution during friction stir welding of ultrafine grained Al alloys
AU - Sato, Y. S.
AU - Urata, M.
AU - Kurihara, Y.
AU - Park, S. H.C.
AU - Kokawa, H.
AU - Ikeda, K.
AU - Tsuji, N.
PY - 2006/1/1
Y1 - 2006/1/1
N2 - Recently, several metallic materials with ultrafine-grained structures and characterized by high strength and toughness have been developed. When these ultrafine-grained materials are practically used, welding and joining processes are required. However, conventional fusion welding processes result in deterioration of the good mechanical properties of these ultrafine-grained materials due to the drastic grain growth of the ultrafine grains. On the other hand, friction stir welding (FSW) is a solid-state joining process having lower heat-input than fusion welding processes, enabling formation of a fine grain structure in the stir zone. Thus, this process would effectively alleviate deterioration of mechanical properties of the ultrafine-grained materials. The authors applied FSW to ultrafine-grained Al alloys and then examined the microstructural features associated with hardness in the friction stir welds. The present paper reviews microstructural evolution of ultrafine-grained Al alloys, produced by equal channel angular pressing (ECAP) and accumulative roll-bonding (ARB), during FSW.
AB - Recently, several metallic materials with ultrafine-grained structures and characterized by high strength and toughness have been developed. When these ultrafine-grained materials are practically used, welding and joining processes are required. However, conventional fusion welding processes result in deterioration of the good mechanical properties of these ultrafine-grained materials due to the drastic grain growth of the ultrafine grains. On the other hand, friction stir welding (FSW) is a solid-state joining process having lower heat-input than fusion welding processes, enabling formation of a fine grain structure in the stir zone. Thus, this process would effectively alleviate deterioration of mechanical properties of the ultrafine-grained materials. The authors applied FSW to ultrafine-grained Al alloys and then examined the microstructural features associated with hardness in the friction stir welds. The present paper reviews microstructural evolution of ultrafine-grained Al alloys, produced by equal channel angular pressing (ECAP) and accumulative roll-bonding (ARB), during FSW.
KW - Accumulative roll-bonding
KW - Equal channel angular pressing
KW - Friction stir welding
KW - Hardness
KW - Microstructure
UR - http://www.scopus.com/inward/record.url?scp=35348900728&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=35348900728&partnerID=8YFLogxK
U2 - 10.4028/0-87849-985-7.169
DO - 10.4028/0-87849-985-7.169
M3 - Conference contribution
AN - SCOPUS:35348900728
SN - 0878499857
SN - 9780878499854
T3 - Materials Science Forum
SP - 169
EP - 174
BT - Nanomaterials by Severe Plastic Deformation, NanoSPD3 - Proceedings of the 3rd International Conference on Nanomaterials by Severe Plastics Deformation
PB - Trans Tech Publications Ltd
T2 - 3rd International Conference on Nanomaterials by Severe Plastics Deformation, NanoSPD3
Y2 - 22 September 2005 through 26 September 2005
ER -