作者：褚玉龙^1,2, 张长田¹, 潘雪纯¹, 季春明¹, 陈亚军¹

作者单位：1. 中国民航大学中欧航空工程师学院, 天津 300300;
2. 中国航发上海商用航空发动机制造有限责任公司, 上海 201306

关键词：数字图像相关技术;GH2036;热处理;疲劳寿命;显微硬度

摘要：

为探究热处理工艺参数对GH2036合金硬度及疲劳性能的影响，基于四因素三水平正交热处理实验，对GH2036铁基高温合金的硬度性能进行优化，并分析热处理后的显微组织；同时利用疲劳实验与DIC（digital image correlation）非接触全场应变测量相结合的方法，利用Y方向应变-疲劳寿命比的云图，直观地分析热处理后GH2036合金疲劳失效过程。结果表明：固溶温度对合金硬度性能的影响最大，其次是固溶时间、时效时间、时效温度，极差分析所得的最优热处理工艺为960 ℃/60 min+水冷+560 ℃/2 h；正交试验中最高显微维氏硬度（HV305.34）较未处理试样（HV260.41）提高17.3%；热处理后金相组织基体为奥氏体，增强相为第二相碳化物，显微硬度值随着奥氏体中的第二相碳化物含量的增加而升高；热处理后平均疲劳寿命（942 372次循环）较未处理试样（450 800次循环）提高109%，疲劳性能明显优化。

Hardness optimization and DIC-based fatigue performance analysis of aeronautical alloy GH2036 after heat treatment
CHU Yulong^1,2, ZHANG Changtian¹, PAN Xuechun¹, JI Chunming¹, CHEN Yajun¹
1. Sino-European Institute of Aviation Engineering, Civil Aviation University of China, Tianjin 300300, China;
2. AECC Shanghai Commercial Aircraft Engine Manufacturing Co., Ltd., Shanghai 201306, China
Abstract: In order to study the effect of heat treatment process parameters on hardness and fatigue performances of GH2036 alloy, based on the four-factor and three-level orthogonal heat treatment experiment, the hardness optimization of GH2036 iron-based alloy with heat treatment was carried out, and the microstructures after heat treatment were observed and analyzed. Meanwhile, the fatigue performance and failure process of GH2036 alloy after heat treatment was directly analyzed by the combination of the fatigue testing and the digital image correlation (DIC), non-contact full field strain measurement technique, using the strain-fatigue life ratio cloud of Y direction. The results show that, the most important factor that influences the hardness property of alloy is solution temperature, followed by solution time, aging time and aging temperature. By using of range analysis, the best optimized heat treatment scheme is 960 ℃/60 min + water cooling + 560 ℃/2 h; the maximum micro Vickers hardness (HV305.34) is improved by 17.3% compared with that of the non-heated specimen (HV260.41) in the orthogonal experiments; after the heat treatment, the microstructure of GH2036 alloy matrix is austenite and the enhanced phase is the second phase carbide, and micro-hardness value increases with the augmentation of the second phase carbide content in austenite; fatigue life of GH2036 alloy with heat treatment (942 372 cycles) improves by 109% compared with that of specimen without heat treatment (450 800 cycles), which shows a great improvement in fatigue performance.
Keywords: digital image correlation (DIC) technique;GH2036;heat treatment;fatigue life;micro-hardness
2020, 46(2):148-154  收稿日期: 2018-11-03;收到修改稿日期: 2019-03-15
基金项目: 天津市企业科技特派员项目(18JCTPJC66800)
作者简介: 褚玉龙(1989-),男,工程师,硕士,主要从事航空发动机先进材料力学性能研究
参考文献
[1] 《中国航空材料手册》编辑委员会. 变形高温合金 铸造高温合金. 中国航空材料手册第2卷[M]. 2版. 北京:中国标准出版社, 2002:79-92.
[2] XU X L, YU Z W. Investigation of damage features of a turbo-disk[J]. Engineering Failure Analysis, 2009, 16(5):1554-1561
[3] 陈亚军, 季春明, 吴幸星, 等. 航空用GH2036合金的VIC-3D静载分析和冲击性能优化[J]. 热加工工艺, 2017, 46(9):112-138
[4] 刘东华. 粉末冶金铁基高温合金的制备及其微观组织和高温性能研究[D]. 长沙:中南大学, 2010.
[5] 孔永华, 李龙, 陈国胜, 等. 不同热处理工艺对GH4169合金组织及性能的影响[J]. 稀有金属材料与工程, 2010, 39(S1):472-475
[6] JI Z, YANG H, LI H W. Contributions of microstructural features to the integrated hardness of TA15 titanium alloy[J]. Materials Science & Engineering A, 2015, 628:358-365
[7] 郭薇. 粉末冶金铁基高温合金组织及力学性能研究[D]. 长沙:中南大学, 2012.
[8] 刘祖铭, 张刘杰, 刘咏, 等. 氧化物弥散强化铁基高温合金研究现状[C]//2009全国粉末冶金学术会议论文集. 长沙:中国粉末冶金联合会, 2009.
[9] SRILAKSHMI R, RAMJI M, CHINTHAPENTA V. Fatigue crack growth study of CFRP patch repaired Al 2014-T6 panel having an inclined center crack using FEA and DIC[J]. Engineering Fracture Mechanics, 2015, 134(13):182-201
[10] RANKIN K, DICKINSON A, BRISCOE A, et al. Evaluation of a novel polyetheretherketone femoral component with improved bone remodelling stimulus for total knee arthroplasty[J]. Journal of Molecular Modeling, 2016, 22(4):100
[11] 朱魁章, 程腾, 仰叶, 等. 基于DIC的斯特林制冷机振动非接触三维全场测试方法[J]. 中国测试, 2015, 41(5):1-4
[12] HAN X L, LIU L, CHEN W, et al. Optimized analysis of orthogonal experiment of continuous casting powder components based on Matlab[J]. Advanced Materials Research, 2013, 774-776:1301-1305
[13] 高红俐, 刘欢, 齐子诚, 等. 基于DIC谐振载荷作用下疲劳裂纹尖端位移应变场测量[J]. 兵器材料科学与工程, 2016(1):16-22