Low-cycle fatigue properties and life prediction of aging strengthenedhigh-nickel Inconel-718 alloy

doi:10.13251/j.issn.0254-6051.2021.07.001

Abstract

Abstract: High-temperature low-cycle fatigue properties at 350 ℃ of the aging-strengthened 0Cr20Ni55Mo3Nb5Ti (Inconel-718) alloy was researched. The relationship between strain level and fatigue life was calculated and compared based on Manson-Coffin and Zheng models. The test results show that excellent low-cycle properties are obtained in Inconel-718 alloy after 970 ℃×1 h, AC+720 ℃×8 h, FC+620 ℃×8 h, AC heat treatment. According to Zheng model, the critical strain limit is approximately 0.37%. The fatigue life is longer than 10⁷ with strain levels lower than 0.37%. Without critical strain limit parameter ε₀, the fatigue life prediction accuracy of Manson-Coffin model is relatively lower, especially at low loaded strain condition.

Key words: aging strengthening, high-nickel Inconel-718 alloy, low-cycle fatigue, fatigue life prediction

CLC Number:

TG156.2

Qu Huapeng, Wang Liubing, Wang Donghui, Wu Bingjie, Feng Hanqiu, Chen Haitao, Xu Bin, Song Danrong, Lang Yuping. Low-cycle fatigue properties and life prediction of aging strengthenedhigh-nickel Inconel-718 alloy[J]. Heat Treatment of Metals, 2021, 46(7): 1-6.

References

[1] Liu Xingbo, Dong Jianxin, Tang Bin, et al. Investigation of the abnormal effects of phosphorus on mechanical properties of INCONEL718 superalloy[J]. Materials Science and Engineering A, 1999, 270: 190-196.
[2] Lu Hongjun, Jia Xinchao, Zhang Kaifeng, et al. Fine-grained pretreatment process and superplasticity for INCONEL718 superalloy[J]. Materials Science and Engineering A, 2002, 326: 382-385.
[3] 李荣斌, 姚枚, 刘文昌, 等. 直接时效工艺对INCONEL718合金组织的影响[J]. 金属热处理, 2002, 27(2): 21-22.
Li Rongbin, Yao Mei, Liu Wenchang, et al. Effect of direct aging treatment on structure of Inconel 718 Alloy[J]. Heat Treatment of Metals, 2002, 27(2): 21-22.
[4] 陈亮, 庞华, 宋小明, 等. Inconel 718合金压紧弹簧应力腐蚀开裂的应力阈值研究[J]. 核动力工程, 2015, 36(S2): 97-101.
Chen Liang, Pang Hua, Song Xiaoming, et al. Research on stress threshold of stress corrosion cracking of Inconel 718 alloy hold-down spring[J]. Nuclear Power Engineering, 2015, 36(S2): 97-101.
[5] 洪班德, 伊晓, 孟庆昌. δ-Ni₃Nb对Inconel718合金低周疲劳断裂行为的影响[J]. 金属学报, 1991, 27(1): 55-60.
Hong Bande, Yi Xiao, Meng Qingchang. Effect of δ-Ni₃Nb on low cycle fatigue fracture of Inconel 718[J]. Acta Metallurgica Sinica, 1991, 27(1): 55-60.
[6] 姚亮亮, 张显程, 刘峰, 等. GH4169镍基高温合金的高温低周疲劳性能[J]. 机械工程材料, 2016, 40(4): 25-29.
Yao Liangliang, Zhang Xiancheng, Liu Feng, et al. High-temperature low-cycle fatigue properties of GH4169 Ni-based superalloy[J]. Materials for Mechanical Engineering, 2016, 40(4): 25-29.
[7] 汪诚, 任旭东, 周鑫, 等. 激光冲击对GH742镍基合金疲劳短裂纹扩展的影响[J]. 金属热处理, 2009, 34(7): 57-60.
Wang Cheng, Ren Xudong, Zhou Xin, et al. Influence of laser shock processing on short crack growth of GH742 nickel-base alloy[J]. Heat Treatment of Metals, 2009, 34(7): 57-60.
[8] 林晨. 热处理对镍基合金碳化钨硬面涂层疲劳强度的影响[J]. 金属热处理, 2006, 31(2): 37-40.
Lin Chen. Effect of heat treatment on the fatigue strength of vacuum melted Ni based alloy -WC composite coating[J]. Heat Treatment of Metals, 2006, 31(2): 37-40.
[9] INCONEL Alloy 718[EB/OL]. US, Publication No. SMC-045, Special Metals, 2007-09-07. http://www. specialmetals.com.
[10] 袁熙, 李舜酩. 疲劳寿命预测方法的研究现状与发展[J]. 航空制造技术, 2005, 31(12): 80-84.
Yuan Xi, Li Shunming. Research status and development of forecast method of fatigue life[J]. Aeronautical Manufacturing Technology, 2005, 31(12): 80-84.
[11] 王建国, 王红缨, 王连庆. GH4169合金高温多轴非比例加载下疲劳断口特征[J]. 北京科技大学学报, 2008, 30(4): 383-390.
Wang Jianguo, Wang Hongying, Wang Lianqing. Fatigue fracture characteristics of GH4169 super-alloy under non-proportional loading at high temperature[J]. Journal of University of Science and Technology Beijing, 2008, 30(4): 383-390.
[12] 雷冬. 疲劳寿命预测若干方法的研究[D]. 合肥: 中国科学技术大学, 2006: 15-18.
Lei Dong. Reach on prediction methods of fatigue life[D]. Hefei: University of Science and Technology of China, 2006: 15-18.
[13] 张国栋, 苏彬. 高温低周应变疲劳的三参数幂函数能量方法研究[J]. 航空学报, 2007, 28(2): 314-318.
Zhang Guodong, Su bin. A method based on energy and three-parameter power function for low cycle fatigue[J]. Acta Aeronautica et Astronautica Sinica, 2007, 28(2): 314-318.
[14] 郑修麟, 张钢柱. 应变疲劳公式的研讨[J]. 西北工业大学学报, 1984, 2(2): 223-229.
Zheng Xiulin, Zhang Gangzhu. On fatigue formula under strain cycling[J]. Journal of Northwestern Polytechnical University, 1984, 2(2): 223-229.