Low-cycle fatigue behavior of DZ125 superalloy under prior exposure conditions

被引：0
作者：
Hong-Yu Qi
Xiao-Lei Zheng
Li-Qiang Ma
Shao-Lin Li
Xiao-Guang Yang
Duo-Qi Shi
机构：
[1] Beihang University,School of Energy and Power Engineering
[2] Collaborative Innovation Center of Advanced Aero-Engine,Shenyang Engine Design and Research Institute
[3] Aviation Industry Corporation of China,undefined
来源：
Rare Metals | 2023年 / 42卷
关键词：
Nickel-based superalloy; Oxidation; Prior exposure; Low-cycle fatigue; Continuum damage mechanics;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Low-cycle fatigue (LCF) behavior of the directionally solidified (DS) nickel-based DZ125 superalloy was studied at elevated temperature (980 °C). Specimens were, respectively, exposed for 0, 2, 25, 50, and 100 h in air. The fatigue life of pre-exposed specimens is lower than that of unexposed specimens. The result is closely associated with fatigue crack initiation and propagation due to oxygen embrittlement and cycle loading. Detailed fractographic evaluations indicate the fatigue life is closely related to the surface microstructural modification. The resulting changes in microstructure cause the decrease in the effective area and the increase in actual stress. A methodology based on the continuum damage mechanics is developed to describe the correlation between the residual LCF life and pre-exposed time.
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页码：2028 / 2036
页数：8
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  • [1] Fan ZD(2015)Corporate effects of temperature and strain range on the low cycle fatigue life of a single-crystal superalloy DD10 Acta Metall Sin Engl 28 152-undefined
  • [2] Wang D(2010)Lifetime evaluation of a thick thermal barrier coated superalloy used in turbine blade Mat Sci Eng A 527 5474-undefined
  • [3] Lou LH(2015)Grain refinement and high strain rate superplasticity in alumunium 2024 alloy processed by high-pressure torsion Mat Sci Eng A 622 139-undefined
  • [4] Ray AK(1991)Long-term oxidation behaviour of Ni3Al alloys with and without chromium additions J Mater Sci 26 6097-undefined
  • [5] Bose SC(2002)Hot corrosion in gas turbine components Eng Fail Anal 9 31-undefined
  • [6] De PK(2005)Common failures in gas turbine blades Eng Fail Anal 12 237-undefined
  • [7] Das DK(2015)Microstructural evolution and deformation features in gas turbine blades operated in-service J Alloys Compd 618 728-undefined
  • [8] Alhamidi A(2006)Corrosion fatigue phenomena learned from failure analysis Eng Fail Anal 13 516-undefined
  • [9] Horita Z(2006)Gas phase embrittlement and time dependent cracking of nickel based superalloys Energy Mater 1 59-undefined
  • [10] Pan YC(2015)Hot workability characteristics of Rene88DT superalloy with directionally solidified microstructure Rare Met 34 51-undefined
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