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- 가스분사법으로 제조된 Mg-6 wt.% Al-1 wt.% Zn 합금의 시효특성
- 이두형, 김보식, 장시영
- The Aging Characteristics of Mg-6 wt.% Al-1 wt.% Zn Alloy Prepared by Gas Atomization
- Du-Hyung Lee, Bo-Sik Kim, Si-Young Chang
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Journal of Korean Powder Metallurgy Institute 2009;16(4):275-279
DOI: https://doi.org/10.4150/KPMI.2009.16.4.275
2한국항공대학교 항공재료공학과
3한국항공대학교 항공재료공학과
1Department of Materials Engineering, Korea Aerospace University
2Department of Materials Engineering, Korea Aerospace University
3Department of Materials Engineering, Korea Aerospace University
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Abstract
The aging characteristics of gas atomized Mg-6 wt.% Al-1 wt.% Zn alloy were investigated and compared to those of cast Mg-6 wt.% Al alloy. The gas atomized Mg-6 wt.% Al-1wt.% Zn alloy powders had spherical morphology between 1 and 100 mu m in diameter. After compaction under the pressure of 700 MPa at 320°C for 10 min, the Mg-6 wt.% Al-1 wt.% Zn alloy showed a grain size of approximately 40 mu m which is smaller than that of the cast Mg-6 wt.% Al alloy, and a relative compact density of approximately 93%. After ageing, the Mg-6 wt.% Al-1 wt.% Zn alloy showed much faster peak hardness than cast Mg-6 wt.% Al alloy. The Mg-6 wt.% Al-1 wt.% Zn alloy showed the new fine precipitations with ageing time, while the cast Mg-6 wt.% Al alloy was almost similar morphology.
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