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论文类型：期刊论文

发表时间：2016-08-15

发表刊物：JOURNAL OF ALLOYS AND COMPOUNDS

收录刊物：SCIE、EI、Scopus

卷号：676

页面范围：202-208

ISSN号：0925-8388

关键字：Inconel 740 superalloy; Electron beam smelting; Microstructure; Vickers hardness; Oxidation behavior

摘要：A novel method, namely electron beam smelting (EBS) technology was used to prepare the Inconel 740 superalloy. The microstructures, hardness and oxidation behavior were characterized and compared with the traditionally prepared Inconel 740 superalloy. The results imply that the solution treatment gives rise to the coarsening of gamma' precipitates, with further aging treatment, the gamma' precipitates with size of less than 30 nm are distributed dispersively in the matrix, leading to a decreasing of the lattice parameters and an increasing of the misfit. The gamma' precipitates result in shearing mechanism of weakly pair coupling. The EBS 740 superalloy produces better properties than that prepared in the traditional method in both precipitation strengthening effect and oxidation resistance. (C) 2016 Elsevier B.V. All rights reserved.