田淞文,王欣,刘丽荣,田素贵

• 1:沈阳三迪度维科技开发有限公司
• 2:沈阳工业大学材料科学与工程学院

摘要(Abstract)：

通过对改进GH4169合金进行不同制度热处理、蠕变性能测试和组织观察，研究了长期时效处理对合金蠕变行为的影响。结果表明：合金经常规热处理的组织由γ、γ′、γ″相、粒状碳化物和δ相组成，其中，弥散分布的粒状γ′和椭圆状γ″相以相干方式分布在合金基体中，粒状碳化物在晶界和晶内析出，而δ相分布于晶界。蠕变期间，粒状碳化物可抑制晶界滑移，阻碍位错运动，使得合金具有良好的服役性能。由于长期时效处理增加了针状δ相的数量和尺寸，割裂了基体的连续性，蠕变期间激活的位错滑移至晶界受阻，可促使裂纹沿晶界的萌生与扩展，使长期时效后合金的蠕变寿命较低。

关键词(KeyWords)： 改进GH4169合金;热处理;组织;蠕变行为

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金重点基金(50634030)

作者(Author): 田淞文,王欣,刘丽荣,田素贵

DOI: 10.13289/j.issn.1009-6264.2022-0367

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