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Vol.27, No.5, 405 ~ 414, 1989
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| Title |
| Solute Segregation and Precipitation Structure in Al - Mg - Si alloy with Small Amounts of Chromium and Titanium |
| 최정철Jeong Cheol Choe, 수총 유강Hiroyasu Tezuka, 신미 창언Akihiko Kamio, 고교 항부tsuneo Takahashi, 류성곤Sung Kon Yu |
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| Abstract |
| In Al-1.1wt%Mg-0.68wt%Si alloy the effect of Cr and Ti additions on precipitation behavior of the homogenized and/or aged specimens has been investigated homogenizing. Ephase(Al, Mg, Cr₂) is preferentially precipitated around Mg₂Si and distributed unevenly near a cored dendrite structure. With the addition of Cr and Ti the aged microstructure has indicated that the coarsening of needle-shaped G. P. zone and rod-shaped intermediate phase(β`) is delayed, and transition from needle-shaped G. P. zone to β` phase is, thus, delayed. This in turn, caused deceleration of the hardness decrease rate during overaging. |
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