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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2024.3
- 수록면
- 618 - 628 (11page)
- DOI
- 10.1007/s12540-023-01527-2
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초록· 키워드
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The aim of this study was to substitute Y with Gd for Mg–2Ni–2Y alloy and investigate the effect on the alloy’s microstructuresand mechanical properties. To achieve this purpose, the following three test alloys were investigated: Mg–2Ni–2Y, Mg–2Ni–1Y–1Gd, and Mg–2Ni–2Gd (at%). These alloys mainly consisted of α-Mg, Mg2Ni, and long-period stackingordered (LPSO) phases. The Y-to-Gd substitution and the solution treatment minimally altered the phase composition.
However, the substitution decreased a volume fraction of the LPSO phase by more than 10%, regardless of the solutiontreatment. This led to a reduction of mechanical strengths up to 124 MPa. The ability of Gd to form the LPSO phase wasweaker than that of Y. However, Gd promoted the dissolution of the LPSO phase in α-Mg matrix during solution treatment.
The mechanical properties of the alloy can be explained in terms of the dispersion of the LPSO phase. Increasingthe volume fraction of LPSO in the cast alloy resulted in an increase in uniformity of the phase dispersion after subsequentextrusion (0.056 to 0.100 in the degree of dispersion), thereby enhancing the strength of the alloy.
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