Influence of small hole on thermal mechanical fatigue in single crystal superalloy DD6

被引：0
|
作者：
Jing F. [1 ]
Tang S. [1 ]
Yang J. [2 ]
机构：
[1] Aero Engine Academy of China, Aero Engine Corporation of China, Beijing
[2] Institute for Aero Engine, Tsinghua University, Beijing
来源：
Hangkong Dongli Xuebao/Journal of Aerospace Power | 2021年 / 36卷 / 08期
关键词：
In⁃phase (IP); Life prediction; Out⁃of⁃phase (OP); Single crystal; Stress concentration; Thermal mechanical fatigue (TMF);
D O I：
10.13224/j.cnki.jasp.20200469
中图分类号：
学科分类号：
摘要：
Mechanical strain⁃controlled thermal mechanical fatigue (TMF) tests under in⁃phase (IP)and out⁃of⁃phase (OP) cycles were performed on specimens with/without small hole made of nickel based single crystal superalloy DD6, and the impacts of stress concentration induced by small hole and phase shift between the mechanical strain and temperature on lifetime on crack initiation were studied.The results indicated that the life of the specimens with small hole whose cracks initiated at the location of maximum principal stress around the hole was one order of magnitude lower than that of smooth ones.Moreover, the OP life was lower than IP for specimens with small hole, which was consistent with that for specimens without small hole.The distribution and evolution of stress and strain in the specimens were obtained with the aid of numerical simulation with viscoplastic constitutive model based on slip systems.The correlation between the damage generated in single crystal superalloy under TMF loadings and the macro⁃/micro⁃parameters was identified.Based on the above⁃mentioned results, a new life model which could consider the effect of stress concentration and phase shift was proposed for the TMF life prediction.The predicted life of DD6 specimens with and without small hole under IP and OP TMF loadings was approximately within a factor 2 of the experimental life. © 2021, Editorial Department of Journal of Aerospace Power. All right reserved.
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页码：1669 / 1679
页数：10
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共 30 条
  • [1] KERSEY R K, STAROSELSKY A, DUDZINSK D C, Et al., Thermomechanical fatigue crack growth from laser drilled holes in single crystal material, International Journal of Fatigue, 55, pp. 183-193, (2013)
  • [2] ZHANG W J., Thermal mechanical fatigue of single crystal superalloys:achievements and challenges[J], Materials Science and Engineering:A, 650, pp. 389-395, (2016)
  • [3] JONES J, WHITTAKER M, LANCASTER R, Et al., The influence of phase angle,strain range and peak cycle temperature on the TMF crack initiation behaviour and damage mechanisms of the nickel based superalloy,RR1000[J], International Journal of Fatigue, 98, pp. 279-285, (2017)
  • [4] YU J J, HAN G M, CHU Z K, Et al., High temperature thermo⁃mechanical and low cycle fatigue behaviors of DD32 single crystal superalloy[J], Materials Science and Engineering:A, 592, pp. 164-172, (2014)
  • [5] WANG R Q, JIANG K H, JING F L, Et al., Thermomechanical fatigue investigation on a single crystal nickel superalloy turbine blade[J], Engineering Failure Analysis, 66, 8, pp. 284-295, (2016)
  • [6] BOUTAREK N, SAIDI D, ACHEHEB M A, Et al., Competition between three damaging mechanisms in the fractured surface of an Inconel 713 superalloy, Materials Characterization, 59, 7, pp. 951-956, (2008)
  • [7] YANG X G, WANG J K, LIU J L., High temperature LCF life prediction of notched DS Ni⁃based superalloy using critical distance concept[J], International Journal of Fatigue, 33, pp. 59-66, (2011)
  • [8] GATES N, FATEMI A., Notch deformation and stress gradient effects in multiaxial fatigue, Theoretical and Applied Fracture Mechanics, 84, pp. 3-25, (2016)
  • [9] LIANG J W, AI X, WEN Z X, Et al., Experimental investigation on low cycle fatigue of DZ125 with film cooling holes in different processes of laser drilling[J], Engineering Failure Analysis, 59, pp. 326-333, (2016)
  • [10] JIANG Kanghe, Thermomechanical fatigue damage mechanism and life prediction of a single crystal nickel superalloy, (2017)
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