18.97.9.173
18.97.9.173
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SCIE SCOPUS
Al - Li - Cu - Zr 합금의 기계적 성질에 미치는 저온 시효 열처리의 영향
The Effects of Low Temperature Aging Treatments on the Mechanical Properties of Al - Li - Cu - Zr Alloy
김종희(J . H . Kim), 이용연(Y . Y . Lee), 천병선(B . S . Chun)
UCI I410-ECN-0102-2008-580-001842892

The effects of low temperature aging on the impact toughness and mechanical properties of Al-1.9%Li-3.0%Cu-0.15%Zr alloy have been investigated. It shows that the impact absorption energy and elongation are increased in the order of over-aged, peak-aged and under-aged specimen at the various aging temperature, and these values in the specimen peak-aged at lower aging temperature are increased. In the specimens aged at 120℃ and 140℃, dimples are observed in the matrix and around the grain boundary. Intergranular fracture has been observed noticeably in the 160℃ peak aged specimen. These results are attributed to the microstructural changes by the low temperature aging treatment that forms more dense and homogeneous distribution of T₁ phases on the dislocations within the matrix and more narrow precipitate free zone in the grain boundary at 120℃ and 140℃ than at 160℃.

[자료제공 : 네이버학술정보]
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