TY - GEN
T1 - Forming of housing by impact extrusion press using ultrafine-grained semi-solid light metal
AU - Natori, Keiko
AU - Yashima, Tomoaki
AU - Arao, Yoshihiko
AU - Tanaka, Tatsuya
PY - 2012
Y1 - 2012
N2 - The forming of thin-walled aluminium housing by impact backward extrusion process was conducted, and the influence of metal microstructure on its formability was investigated. Aluminium alloys of A3003, AC4CH-F and semi-solid state of AC4CH were used as test materials. Additionally, ultrafine-grained metal were fabricated by Equal-Channel Angular Pressing method using a die having channel, φ=90°, Ψ=15 °, from semi-solid AC4CH alloy. And then, cylindrical housings with 9.4mm in diameter and 0.5mm in thickness were formed from as-cast materials and ECAPed samples by impact backward extrusion at room temperature. As a result, press load required for extrusion was decreased using a material processed with increasing the number of ECAP. Vickers hardness of the products was greater than that of the materials before the forming; in the case of using ECAPed materials, the increment was relatively small. This implies that impact extrusion process is a kind of Severe Plastic Deformation that improves mechanical properties of metal materials. Ultrafine-grained semi-solid AC4CH alloy have more possibility to make the housings with further thin thickness than non-ECAP materials.
AB - The forming of thin-walled aluminium housing by impact backward extrusion process was conducted, and the influence of metal microstructure on its formability was investigated. Aluminium alloys of A3003, AC4CH-F and semi-solid state of AC4CH were used as test materials. Additionally, ultrafine-grained metal were fabricated by Equal-Channel Angular Pressing method using a die having channel, φ=90°, Ψ=15 °, from semi-solid AC4CH alloy. And then, cylindrical housings with 9.4mm in diameter and 0.5mm in thickness were formed from as-cast materials and ECAPed samples by impact backward extrusion at room temperature. As a result, press load required for extrusion was decreased using a material processed with increasing the number of ECAP. Vickers hardness of the products was greater than that of the materials before the forming; in the case of using ECAPed materials, the increment was relatively small. This implies that impact extrusion process is a kind of Severe Plastic Deformation that improves mechanical properties of metal materials. Ultrafine-grained semi-solid AC4CH alloy have more possibility to make the housings with further thin thickness than non-ECAP materials.
KW - Aluminium alloy
KW - Equal-Channel Angular Pressing
KW - Impact extrusion
KW - Semi-solid cast
KW - Severe Plastic Deformation
KW - Ultrafine grained materials
UR - http://www.scopus.com/inward/record.url?scp=84907410332&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84907410332&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84907410332
SN - 9781922107619
T3 - Advances in Applied Mechanics Research, Conference Proceedings - 7th Australasian Congress on Applied Mechanics, ACAM 2012
SP - 409
EP - 418
BT - Advances in Applied Mechanics Research, Conference Proceedings - 7th Australasian Congress on Applied Mechanics, ACAM 2012
PB - National Committee on Applied Mechanics
T2 - 7th Australasian Congress on Applied Mechanics, ACAM 2012
Y2 - 9 December 2012 through 12 December 2012
ER -