dispersion distribution, which promotes the fine and diffuse distribution of the original chain NbC in the matrix. The results provide a direct reference for the improvement of GH4169 flash soldering performance. [ABSTRACT FROM AUTHOR]
| Abstract (Chinese): |
：通过Gleeble3500热模拟试验机进行热压缩试验并结合微观组织观察和统计分析，研究了热变形对GH4169合 金中NbC颗粒尺寸形貌、分布特征的影响规律。结果表明：压缩过程中的绝热效应会导致试样心部温度的进一步升高， 从而为变形过程中的NbC回溶提供条件。NbC颗粒与基体在变形过程中形成的高位错密度区促进了元素的扩散，并加 速了小曲率半径的尖角区域回溶和钝化。随变形量的增加NbC回溶趋势增加，其平均尺寸与体积分数均呈降低趋势。 变形过程金属流动会促进NbC颗粒的位移，在70%的变形量下，NbC颗粒平均间距增加趋势显著高于30%和50%变形 量试样。因此随变形量的增加，NbC颗粒有从链状--链条弯曲一＞链条方向改变--弥散分布的分布特征，促进基体中原 链状NbC呈细小、弥散分布。研究结果为GH4169闪光焊接性能的提高提供了直接的参考. [ABSTRACT FROM AUTHOR] |
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| Autor: |
李阳, 魏志坚, 徐平伟, 梁益龙, 梁宇 |
| Zdroj: |
Rare Metal Materials & Engineering; May2020, Vol. 49 Issue 5, p1773-1780, 8p |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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