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Microstructures and mechanical properties of electron beam welded joint of low expansion superalloy GH783
Author(s): 
Pages: 38-42
Year: Issue:  7
Journal: Welding & Joining

Keyword:  GH783合金电子束焊显微组织力学性能;
Abstract: 采用电子束焊接的方法焊接GH783合金,焊缝枝晶间偏析生成Laves/γ相共晶,1 121℃固溶处理后大部分Laves/γ相消除,β相在枝晶间析出,标准热处理后β相的数量增加,γ\'相在基体中弥散析出.焊接接头的硬度分布较为均匀,焊缝中的γ-γ\',-β三相组织保证了接头的力学性能,使接头的室温抗拉强度比母材略高,650℃的抗拉强度与塑性均高于母材,750℃的抗拉强度和塑性与母材接近,接头同时具有优良...
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