田素贵,舒德龙,曾征,刘臣,郭忠革

• 1:沈阳工业大学材料科学与工程学院

摘要(Abstract)：

通过对有/无元素Re合金进行蠕变曲线测定及组织形貌观察,研究了元素Re对镍基单晶合金中温蠕变行为的影响。结果表明:与无Re合金相比,4.5%Re合金在中温/高应力条件下具有良好的蠕变抗力。蠕变期间无Re合金中的#'相转变成串状,而4.5Re合金中的#'相仍保持立方体形貌,有/无元素Re合金在中温蠕变期间的变形机制均为<110>超位错剪切#'相,切入#'相的超位错可在{111}面滑移,或在{111}面分解形成{112}超肖克莱不全位错+(SISF)的位错组态,抑制其交滑移;其中,4.5%Re合金中切入#'相的<110>超位错可由{111}面交滑移至(100)面,形成K-W锁,是使合金具有良好蠕变抗力的重要原因之一。

关键词(KeyWords)： 单晶镍基合金;元素Re;组织结构;中温蠕变;变形机制;K-W锁

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金资助项目(51271125);; 教育部博士点基金(20092102110003)

作者(Author): 田素贵,舒德龙,曾征,刘臣,郭忠革

DOI: 10.13289/j.issn.1009-6264.2013.08.012

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