田耘,李帅华,杨峥,柳光祖

• 1:钢铁研究总院

摘要(Abstract)：

通过对比粗、细两种晶粒组织状态的MGH956合金板材,在光滑和缺口拉伸条件下的韧脆转变温度(Ductile-BrittleTransition Temperature,DBTT),及高温持久性能,研究了细化晶粒对改善MGH956合金板材低温脆性的作用,及高温持久强度的影响。结果表明:细化晶粒有效地改善了MGH956合金板材的低温脆性,明显降低其DBTT,在应力集中程度极高的缺口拉伸条件下,细晶板材的DBTT仍可保持在-15℃以下,同时具有较高的高温持久强度。

关键词(KeyWords)： MGH956合金;板材;韧脆转变温度

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 田耘,李帅华,杨峥,柳光祖

DOI: 10.13289/j.issn.1009-6264.2012.04.022

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