Precipitation evolution of Al–Zr–Yb alloys during isochronal aging

Precipitation evolution of Al–Zr–Yb alloys during isochronal aging
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Al-Zr-Yb合金等时时效过程中的析出演化

DOI:
10.1016/j.scriptamat.2013.06.003
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发表时间:
2013-09
期刊:
影响因子:
6
通讯作者:
Weiren You
Weiren You
中科院分区:
材料科学1区
文献类型:
--
作者:
Yongzhi Zhang;Wei Zhou;Haiyan Gao;Yanfeng Han;Kai Wang;Jun Wang;Baode Sun;Sunwang Gu;Weiren You

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研究了Al-Yb、Al-Zr和Al-Zr - yb合金在100 ~ 550℃等时时效过程中的析出强化。Al-0.08 at。% Zr-0.03 at。% Yb合金表现出双峰时效强化行为,在475℃时硬度达到379 MPa,表现出明显的析出强化和热稳定性。l12有序Al3(Zr,Yb)相的临界相干转变半径大于Al3Yb相。讨论了Yb和Zr对Al-Zr-Yb中析出演化的协同作用。
Precipitation strengthening in Al–Yb, Al–Zr and Al–Zr–Yb alloys aged isochronally between 100 and 550 °C was investigated. The Al–0.08 at.% Zr–0.03 at.% Yb alloy shows double-peak age strengthening behavior and obtains its second peak hardness of 379 MPa at 475 °C, which illustrates significant precipitation strengthening and thermal stability. The critical coherency transition radius of L12-ordered Al3(Zr,Yb) precipitates is larger than that of Al3Yb. The synergetic effect of Yb and Zr on the precipitation evolution in Al–Zr–Yb is discussed.
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