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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2014.1
- 수록면
- 87 - 93 (7page)
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초록· 키워드
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Thixo-extrusion of semi-solid 7075 aluminum alloy and the mechanical properties of its extrudates were investigated. The semisolid alloy was prepared by a cooling slope cast. In other to perform thixo-extrusion, semi-solid 7075 aluminum alloy billets were reheated at the reheating conditions reported in a previous study. The maximum extrusion pressure in thixo-extrusion was 615MPa. This was lower than that of conventional hot extrusion ($P_{max}=940MPa$) at the same extrusion conditions due to the increased fluidity of the alloy billet in the semi-solid state. The values of Rockwell hardness (scale B) at the extrusion direction of the as thixoextruded bar were 48~53HRB and the difference in Rockwell hardness between the transverse direction and the extrusion direction was 5HRB or less. The results show that thxio-extrusion of semi-solid 7075 Al alloy improves the workability and anisotropic with the extrusion direction compared with hot extrusion of the conventional alloy.
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참고문헌 (10)
참고문헌 신청
ASM international / 1990 / Properties and Selection: Nonferrous Alloys and Special-Purpose Materials :142~143
M.C. Flemings / 1991 / Behavior of Metal Alloys in the Semisolid State / Metall. Trans. 22:957~981
M. Kiuchi / 2002 / Mushy / Semi-Solid Metal Forming Technology - Present and Future / Ann. CIRP 51:653~670
Z. Fan / 2002 / Semisolid metal processing / Int. Mater. Rev. 47:49~85
K. Lane / 1981 / Extrusion / ASM Publishers :124~152
M.C. Flemings / 1991 / Behavior of Metal Alloys in the Semisolid State / Metall. Trans. 22:957~981
M. Kiuchi / 2002 / Mushy / Semi-Solid Metal Forming Technology - Present and Future / Ann. CIRP 51:653~670
Z. Fan / 2002 / Semisolid metal processing / Int. Mater. Rev. 47:49~85
K. Lane / 1981 / Extrusion / ASM Publishers :124~152
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