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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2016.1
- 수록면
- 1,091 - 1,097 (7page)
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초록· 키워드
오류제보하기
It is usual to observe that multi-scale structures can lead to combined strength and ductility both in aluminumalloys and steels, but related research has been seldom reported yet in magnesium alloys. In this study, applyingtraditional one step extrusion, we have successfully obtained a bimodal (Mg-9Gd-4Y-0.5Zr) alloy capable ofultra-high strength. The characterized sample reveal a bi-modal microstructure with two constitutions, i.e. stretchedcoarse-grain region with strong basal fiber texture and recrystallization fine-grain region. The bi-modal structuredsample exhibit excellent mechanical properties with an ultimate strength 508 MPa and elongation 8% via400 °C extrusion and subsequently 200 °C-60 h peak aging process. Ultra-high strength can be attributed toits strong extrusion texture in stretched coarse grains and dispersed nano-scale precipitates. This uniquebimodal structure could be produced easily by one step extrusion, which is quite reliable and low costs inindustrial applications of magnesium alloys with ultra-high strength as well as ideal ductility.
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