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논문 기본 정보

자료유형
학술저널
저자정보
Liang Ren (Northeastern University) Weiyang Zhou (Northeastern University) Yinglong Li (Northeastern University) Qichi Le (Northeastern University) Xiong Zhou (Northeastern University) Qi Zou (Northeastern University) Qiyu Liao (Northeastern University) Tong Wang (Northeastern University)
저널정보
대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.30 No.7
발행연도
2024.7
수록면
1,910 - 1,925 (16page)
DOI
10.1007/s12540-023-01613-5

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초록· 키워드

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The preparation of high-performance rare earth magnesium (Mg–RE) alloy still heavily relies on expensive master alloy asa critical raw material. In order to address this issue, a series of Mg–3Y–xLa2O3 (x = 0, 0.5, 1, 1.5, 2, and 2.5 wt%) alloyswere fabricated utilizing cost-effective rare earth oxides (REmOn). The effect of La2O3on the microstructure and mechanicalproperties of the alloys was thoroughly investigated. Upon the addition of La2O3to the Mg–3Y alloy, in-situ reductionwith Y results in the formation of numerous micron-sized Mg17La2phases, which consequently alters the morphologyand quantity of Mg24Y5phase, as well as the grain size and (0001) basal texture intensity in Mg–3Y alloy. The Mg–3Y–1.5La2O3 alloy exhibits the highest mechanical strength [yield strength (YS) and ultimate tensile strength (UTS) increaseby approximately 48.4 MPa and 36.1 MPa, respectively, compared to the Mg–3Y alloy] among all the samples tested. Theprimary strengthening mechanisms identified are grain boundary, texture, and second-phase strengthening. Moreover, theaddition of La2O3is observed to significantly increase the elongation (EL) of the alloy (Mg–3Y–0.5La2O3). However, theEL gradually decreases as La2O3continues to increase.

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