期刊论文

Dissolution behavior of δ phase in Inconel 718 alloy

Si, J.-Y.

中文

材料热处理学报

1009-6264

2016

37

8

1-6

10.13289/j.issn.1009-6264.2016.08.001

(2012AA03A514):国家“863”计划项目 :湖南省高校科技创新团队支持计划资助

本校为第一且通讯机构

对经δ相时效处理(DP)后的Inconel 718合金中δ相的静态溶解行为进行了研究,分析了不同热处理温度和保温时间下δ相含量、晶粒尺寸和硬度变化,发现了δ相在静态溶解过程中的组织和性能演变规律。结果表明:静态溶解过程中针状δ相形貌特征变化可分为两个阶段,初期主要为长针状δ相溶解成为短针状乃至球状,后期主要是短针状δ相溶解成球状及部分球状δ相;随着保温时间的延长,δ相的溶解量与保温时间的关系由溶解初期的线性关系变为溶解后期的近似抛物线关系,溶解速度逐渐降低;在950、980和1000 ℃时,δ相的溶解量在保温一段时间后达到稳定值,而在温度为1020 ℃和1060 ℃时,δ相可持续溶解,最终完全...

Dissolution behavior of δ phase in Inconel 718 alloy under different heat treatment conditions was studied. The evolution of δ phase and microstructure, and hardness of the alloy after the heat treatments were analyzed. The results show that the morphology of the needle shaped δ phase during the dissolution processing can be divided into two stages: at the early stage, it changes from a long needle shape into a short needle and globular ones and then the short needle δ phase is dissolved into the spherical at the later stage. The dissolutio...