Diffusional mechanism of γ′-phase particles coalescence in single crystals of nickel-base superalloys
Diffusional mechanism of γ′-phase particles coalescence in single crystals of nickel-base superalloys
复制标题
镍基高温合金单晶中γ相颗粒聚结的扩散机制
DOI：
10.1016/0956-716x(92)90648-x
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发表时间：
1992
期刊：
影响因子：
--
通讯作者：
N. P. Abalakin
中科院分区：
文献类型：
--
作者：
I. Svetlov;B. A. Golovko;A. Epishin;N. P. Abalakin
使用 X 射线能量色散谱 (XEDS) 研究了 001 线轴向取向单晶 SC-83 高温合金微体积中伽马相颗粒聚结的扩散机制。合金的热处理程序包括1300℃均匀化4.5小时、空冷、1050℃退火10小时、850℃时效20小时、空冷。在 900 C 和 600 MPa 下进行蠕变试验后，观察到合金元素在 γ 相颗粒周围的微观分布。 XEDS 结果表明，γ 相颗粒的聚结是由合金元素在γ 固溶体夹层中的扩散传输控制的。在此过程中，伽马形成元素Al和Ta相对于所施加的载荷从水平夹层扩散到垂直夹层中，并且伽马稳定元素Cr和Mo沿相反方向扩散。 13 参考文献
The diffusional mechanism of gamma-prime-phase particle coalescence in microvolumes of a single-crystal SC-83 superalloy with 001-line axial orientation was investigated using X-ray energy dispersive spectrometry (XEDS). The procedure for heat treatment of the alloy included homogenization at 1300 C for 4.5 hrs, air cooling, annealing at 1050 C for 10 hrs, aging at 850 C for 20 hrs, and air cooling. Microdistribution of alloying elements around gamma-prime-phase particles was observed after creep tests at 900 C and 600 MPa. Results of XEDS show that the gamma-prime-phase particle coalescence is controlled by diffusional transport of alloying elements in the gamma-solid solution interlayers. In this process, the gamma-prime forming elements Al and Ta diffuse from horizontal interlayers, relative to the applied load, into vertical ones, and the gamma-stabilizing elements Cr and Mo diffuse in the opposite direction. 13 refs.