On the effect of long service exposure: changes in microstructure and mechanical properties of Ni-based superalloy

被引:0
|
作者
Keyvanlou, Hassan [1 ]
Gilakjani, Reza Soleimani [2 ]
Nezakat, Majid [3 ]
机构
[1] Univ Tehran, Fac Engn, Sch Met & Mat Engn, Tehran 111554563, Iran
[2] Iran Univ Sci & Technol, Sch Met & Mat Engn, Tehran 1684613114, Iran
[3] Univ Saskatchewan, Dept Mech Engn, 57 Campus Dr, Saskatoon, SK S7N 5A9, Canada
关键词
creep; microstructural study; mechanical properties; fractography; GTD-111; superalloy; NICKEL-BASED SUPERALLOY; PRECIPITATE MORPHOLOGY; THERMAL EXPOSURE; RUPTURE BEHAVIOR; IMPACT TOUGHNESS; GTD-111; EVOLUTION; CREEP; IMPROVEMENT; GROWTH;
D O I
10.1051/metal/2020080
中图分类号
TF [冶金工业];
学科分类号
0806 ;
摘要
In the present study, the microstructure and the mechanical properties of GTD-111 nickel-based superalloy were investigated. The alloy was in service as the GE-MS9001 gas turbine 1st stage rotating blade for 105,000 hours at a temperature between 950 to 1000 degrees C. Two sets of samples were extracted from the airfoil and the root of the blade. Then, they were compared for the microstructural and the mechanical properties changes after the high temperature service. Stress-rupture and Charpy V-notch (CVN) tests were conducted on the samples at 871 degrees C and two temperatures of 25 and 900 degrees C, respectively. The microstructure and the fracture surface of the samples were analyzed using a scanning electron microscope (SEM). The results showed degradation in the microstructure and the mechanical properties of the airfoil compared to those of the root due to the long-term service at elevated temperatures. The loss in mechanical properties was due to the coarsening of gamma' precipitates and the formation of brittle phases in the grain boundaries.
引用
收藏
页数:8
相关论文
共 50 条
  • [1] The microstructure and mechanical properties of Ni-based superalloy after service exposure in gas turbine
    Yoo, Keun Bong
    Lee, Han Sang
    [J]. PRICM 7, PTS 1-3, 2010, 654-656 : 2523 - 2526
  • [2] The microstructure and mechanical properties of Ni-based superalloy after service exposure in gas turbine
    Yoo, Keun-Bong
    Lee, Han-Sang
    Kim, Doo-Soo
    [J]. STRUCTURAL INTEGRITY AND FAILURE, 2011, 275 : 113 - 116
  • [3] Investigation on the Microstructure and Mechanical Properties of Ni-Based Superalloy with Scandium
    Ye, Lin
    Liu, Feng
    Dong, Heng
    Ouyang, Xiaoqiong
    Xiao, Xiangyou
    Tan, Liming
    Huang, Lan
    [J]. METALS, 2023, 13 (03)
  • [4] MICROSTRUCTURE AND MECHANICAL PROPERTIES OF A Ni-BASED SUPERALLOY WITH REFINED GRAINS
    Yang Jinxia
    Sun Yuan
    Jin Tao
    Sun Xiaofeng
    Hu Zhuangqi
    [J]. ACTA METALLURGICA SINICA, 2014, 50 (07) : 839 - 844
  • [5] Microstructure and Mechanical Property of a Directional Ni-based Superalloy during Long-term Exposure
    Xiao, Xuan
    Xu, Le
    Zeng, Chao
    Sheng, Liyuan
    Guo, Yong'an
    Zhou, Lanzhang
    [J]. MANAGEMENT, MANUFACTURING AND MATERIALS ENGINEERING, PTS 1 AND 2, 2012, 452-453 : 51 - +
  • [6] The microstructure evolution and its effect on the mechanical properties of a hot-corrosion resistant Ni-based superalloy during long-term thermal exposure
    Wang, Jian
    Zhou, Lanzhang
    Sheng, Liyuan
    Guo, Jianting
    [J]. MATERIALS & DESIGN, 2012, 39 : 55 - 62
  • [7] Effect of silicon on microstructure and stress rupture properties of a corrosion resistant Ni-based superalloy during long term thermal exposure
    Liu, T.
    Dong, J. S.
    Xie, G.
    Wang, L.
    Lou, L. H.
    [J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2016, 656 : 75 - 83
  • [8] Effect of Heat Treatment Combined with an Alternating Magnetic Field on Microstructure and Mechanical Properties of a Ni-Based Superalloy
    Chuanjun Li
    Martin Seyring
    Xi Li
    Yunbo Zhong
    Zhongming Ren
    Markus Rettenmayr
    [J]. Metallurgical and Materials Transactions A, 2019, 50 : 1837 - 1850
  • [9] Effect of Warm Rolling on Microstructure Evolution and High Temperature Mechanical Properties of a Novel Ni-based Superalloy
    Kong, Weijun
    Ding, Yutian
    Wang, Xingmao
    Gao, Yubi
    Bi, Zhongnan
    Du, Jinhui
    Gan, Bin
    [J]. Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering, 2023, 52 (08): : 2859 - 2868
  • [10] Effect of Heat Treatment Combined with an Alternating Magnetic Field on Microstructure and Mechanical Properties of a Ni-Based Superalloy
    Li, Chuanjun
    Seyring, Martin
    Li, Xi
    Zhong, Yunbo
    Ren, Zhongming
    Rettenmayr, Markus
    [J]. METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2019, 50A (04): : 1837 - 1850