Effect of dwell condition on fatigue behavior of a high-Nb TiAl alloy at 750 °C

被引：8
|
作者：
Dong, Chengli [1 ]
Jiao, Zehui [1 ]
Yu, Huichen [1 ]
Zhou, Haitao [2 ]
Kong, Fantao [2 ]
Chen, Yuyong [2 ]
机构：
[1] AECC Beijing Inst Aeronaut Mat, Sci & Technol Adv High Temp Struct Mat Lab, Beijing Key Lab Aeronaut Mat Testing & Evaluat, Aviat Key Lab Sci & Technol Aeronaut Mat Testing, Beijing 100095, Peoples R China
[2] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Heilongjiang, Peoples R China
来源：
INTERMETALLICS | 2017年 / 91卷
关键词：
High-Nb TiAl; Low cycle fatigue (LCF); Creep-fatigue interaction (CFI); Dwell condition; Continuum damage accumulation (CDA); LOW-CYCLE FATIGUE; MECHANICAL-PROPERTIES; TENSILE PROPERTIES; DAMAGE MECHANISM; STAINLESS-STEEL; CREEP; MICROSTRUCTURE; TEMPERATURE; TRANSFORMATION;
D O I：
10.1016/j.intermet.2017.07.006
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The strain-controlled low cycle fatigue (LCF) and creep-fatigue interaction (CFI) tests of a newly developed Ti45A1-8Nb-0.2W-0.213-0.02Y (at.%) alloy were carried out at 750 C in air. The hysteresis loop, cyclic stress response and life modeling as well as failure mechanism of the alloy were investigated in detail. It was revealed that the tensile and compressive mean stresses would generate when the dwell condition was introduced at minimum and maximum strain, respectively. In addition, the dwell condition, especially for the compressive dwell condition, would significantly decrease the fatigue life. The typical continuum damage accumulation (CDA) and modified CDA life models proposed in the present study were employed to predict both LCF and CFI life of the alloy, which showed that the modified CDA life model had a higher accuracy than the typical CDA life one. Moreover, only single crack initiation source was observed at 92% (ie. 11/12) of LCF fracture while multiple crack initiation sources at 84% (ie. 31/37) of CFI fracture. Apparently different from LCF specimen showing more transgranular appearance, CFI specimen shows more intergranular appearance.
引用
收藏
页码：1 / 7
页数：7
相关论文
共 50 条
  • [11] Investigations on processing powder metallurgical high-Nb TiAl alloy sheets
    Liu, Yong
    Liang, Xiaopeng
    Liu, Bin
    He, Weiwei
    Li, Jianbo
    Gan, Ziyang
    He, Yuehui
    INTERMETALLICS, 2014, 55 : 80 - 89
  • [12] Duplex microstructure transformation of a cast high-Nb containing TiAl alloy
    State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China
    Beijing Keji Daxue Xuebao, 2007, 3 (278-281+319):
  • [13] Investigations on processing powder metallurgical high-Nb TiAl alloy sheets
    Liu, Yong, 1600, Elsevier Ltd (55):
  • [14] Investigations on processing powder metallurgical high-Nb TiAl alloy sheets
    State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China
    Intermet, (80-89):
  • [15] Fatigue properties of high Nb TiAl alloy
    Kruml, T.
    Dlouhy, A.
    Petrenec, M.
    Obrtlik, K.
    Polak, J.
    15TH INTERNATIONAL CONFERENCE ON THE STRENGTH OF MATERIALS (ICSMA-15), 2010, 240
  • [16] Creep behavior of TiAl-Nb alloy at temperature near 750℃
    Zhang S.-K.
    Tian S.-G.
    Yu H.-C.
    Lü X.-X.
    Jiao Z.-H.
    Li D.-Y.
    Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals, 2019, 29 (08): : 1622 - 1630
  • [17] Size-Dependent Structural Properties of a High-Nb TiAl Alloy Powder
    Liu, Binglin
    Wang, Maosong
    Du, Yulei
    Li, Jingxiao
    MATERIALS, 2020, 13 (01)
  • [18] Precipitates in high-Nb TiAl alloyed with Si
    Yang, L.
    Chai, L. H.
    Wang, Y. L.
    Gao, S. B.
    Song, L.
    Lin, J. P.
    MATERIALS LETTERS, 2015, 154 : 8 - 11
  • [19] Effect of V on the microstructure and brittle-to-ductile transition of directionally solidified high-Nb TiAl alloy
    Xu, Xuesong
    Ding, Hongsheng
    Huang, Haitao
    Liang, He
    Chen, Ruirun
    Guo, Jingjie
    Fu, Hengzhi
    INTERMETALLICS, 2022, 142
  • [20] Fatigue small crack growth threshold determination of a high-Nb TiAl alloy at different temperatures by in-situ observation
    Zhang, Min
    Song, Xi-ping
    Yu, Long
    Li, Hong-liang
    Jiao, Ze-hui
    Yu, Hui-chen
    INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS, 2013, 20 (12) : 1192 - 1197
12345