The influences of aging treatment on the serrated flow of a superalloy specially designed for additive manufacturing

IF 6.1 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Materials Science and Engineering: A Pub Date : 2025-02-02 DOI:10.1016/j.msea.2025.147984

Bin Wu , Jingjing Liang , Yanhong Yang , Jinguo Li , Xiaofeng Sun

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Abstract

Additive manufacturing (AM) superalloys is the materials research frontier full of challenges nowadays. The present paper investigates the tensile deformation behavior of a novel superalloy specifically developed for additive manufacturing. Two kinds of sample state are used: the as-built (directly obtained from AM) and the heat-treated (endured aging treatment at 870 °C for 16 h). During tensile tests at 650 °C and 700 °C, two different strain rates were adopted. It was found that the strength and plasticity of the heat-treated alloy were significantly improved compared with that of the as-built. Furthermore, the as-built alloy exhibited significant serrated plastic flow, the types of serrations varied with the applied strain rate. The serrations were effectively suppressed through aging treatment. To reveal the underlying mechanisms, the microstructures of both as-built and heat-treated alloy were characterized and analyzed. The formation of serrations were ascribed to dynamic strain aging (DSA). This work provides implications for tailoring the microstructure in additively manufactured components to improve properties, thus supporting the practical application of additive manufacturing superalloys.

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来源期刊

Materials Science and Engineering: A 工程技术-材料科学：综合

CiteScore

11.50

自引率

15.60%

发文量

1811

审稿时长

31 days

期刊介绍： Materials Science and Engineering A provides an international medium for the publication of theoretical and experimental studies related to the load-bearing capacity of materials as influenced by their basic properties, processing history, microstructure and operating environment. Appropriate submissions to Materials Science and Engineering A should include scientific and/or engineering factors which affect the microstructure - strength relationships of materials and report the changes to mechanical behavior.