文章信息/Info

Title:

Study on Creep Deformation and Fracture Mechanism of GH3230 Alloy

文章編號:

1674-3962(2025)04-0395-07

作者:

任曉東; 侯成; 許琦鵬; 周芳菁; 曾嘉迅; 楊思遠; 范學領

1. 西安交通大學航天航空學院 西安市極端環境服役性能與防護技術重點實驗室，陜西 西安 710049 2. 中國航發湖南動力機械研究所，湖南 株洲 412002

Author(s):

REN Xiaodong;  HOU Cheng;  XU Qipeng;  ZHOU Fangjing; ZENG Jiaxun;  YANG Siyuan;  FAN Xueling

1. Xi’an Key Laboratory of Extreme Environment and Protection Technology, School of Aerospace Engineering, Xi’an Jiaotong University, Xi’an 710049, China 2. AECC Hunan Aviation Powerplant Research Institute, Zhuzhou 412002, China

關鍵詞:

GH3230; 鎳基高溫合金; 修正θ參數法; 復合時間硬化模型; 蠕變變形

Keywords:

GH3230;  nickel-based superalloy;  modified θ parameter method;  composite time-hardening model;  creep deformation

分類號:

TG132.3

DOI:

10.7502/j.issn.1674-3962.202310026

文獻標志碼:

A

摘要:

作為新一代火焰筒材料，GH3230鎳基高溫合金在極端高溫高壓環境中服役時的蠕變性能尤其重要。開展了GH3230高溫合金在不同應力、不同溫度（800，900和1000 ℃）下的蠕變實驗，基于修正θ參數法和復合時間硬化模型對GH3230合金的蠕變變形進行了預測分析，并對其高溫蠕變斷裂機理進行了闡釋。結果表明，GH3230合金的蠕變壽命與溫度和應力有關。溫度越高、應力越大，合金的蠕變壽命越短。修正θ參數法在溫度和應力均較高時能較好地預測蠕變變形，而復合時間硬化模型在溫度和應力均較低時能較好地預測蠕變變形。GH3230合金的蠕變斷裂為孔洞聚集型的解理斷裂，斷裂路徑表明主要由晶界遷移主導，且蠕變溫度越高斷口韌窩尺寸越大。

Abstract:

As a new generation burner inner liner material, the creep properties of GH3230 nickel-based superalloy are particularly important when serving in extreme high temperature and high pressure environments. In this paper, the creep experiments of GH3230 superalloy under different stresses and temperatures(800, 900 and 1000 ℃) were conducted. The creep deformation of GH3230 alloy was predicted based on the modified θ parameter method and composite time-hardening model, and the high temperature creep fracture mechanism was explained. The results show that the creep deformation of GH3230 alloy is closely related to temperature and stress. The higher the temperature and stress, the shorter the creep life. The modified θ parameter method can predict the creep deformation better when the temperature and stress are high, while the composite time-hardening model can predict the creep deformation better when the temperature and stress are low. The creep fracture of GH3230 alloy is a cavity aggregation cleavage fracture, and the fracture path shows that it is mainly dominated by grain boundary migration, and the higher the creep temperature, the larger the fracture dimple size.