LCF behavior and life prediction method of a single crystal nickel-based superalloy at high temperature
Zhihua ZHANG, Huichen YU, Chengli DONG
LCF behavior and life prediction method of a single crystal nickel-based superalloy at high temperature
Low cycle fatigue tests were conducted on the single crystal nickel-based superalloy, DD6, with different crystallographic orientations (i.e., [001], [011], and [111]) and strain dwell types (i.e., tensile, compressive, and balanced types) at a certain high temperature. Given the material anisotropy and mean stress, both orientation factor and stress range were introduced to the Smith, Watson, and Topper (SWT) stress model to predict the fatigue life. Experimental results indicated that the fatigue properties of DD6 depend on both crystallographic orientation and loading types. The fatigue life of the tensile, compressive, and balanced strain dwell tests are shorter than those of continuous cycling tests without strain dwell because of the important creep effect. The predicted results of the proposed modified SWT stress method agree well with the experimental data.
single crystal superalloy / low cycle fatigue (LCF) / crystallographic orientation / strain dwell / life prediction
[1] |
Li S, Smith D J. High temperature fatigue-creep behaviour of single crystal SRR99 nickel base superalloys: Part 1—Cyclic mechanical response. Fatigue & Fracture of Engineering Materials & Structure, 1995, 18(5): 617–629
CrossRef
Google scholar
|
[2] |
Versnyder F L, Shank M E. Development of columnar grain and single crystal high temperature materials through directional solidification. Materials Science and Engineering, 1970, 6(4): 213–247
CrossRef
Google scholar
|
[3] |
Ma X, Shi H, Gu J,
|
[4] |
Li S, Smith D J. Development of anisotropic constitutive model for single-crystal superalloy for combined fatigue and creep loading. International Journal of Mechanical Sciences, 1998, 40(10): 937–948
CrossRef
Google scholar
|
[5] |
Yue Z, Yang Z, Lu Z. Life prediction model for a nickel-base single crystal superalloy DD3. Chinese Journal of Aeronautics, 2002, 15(4): 239–243
CrossRef
Google scholar
|
[6] |
Li S, Ellison E G, Smith D J. The influence of orientation on the elastic and low cycle fatigue properties of several single crystal nickel base superalloys. The Journal of Strain Analysis for Engineering Design, 1994, 29(2): 147–153
CrossRef
Google scholar
|
[7] |
Yu H, Li Y, Zhang S,
|
[8] |
Dong C, Yu H, Li Y,
CrossRef
Google scholar
|
[9] |
Li S, Smith D J. High temperature fatigue-creep behaviour of single crystal SRR99 nickel base superalloys: Part 2—Fatigue-creep life behaviour. Fatigue & Fracture of Engineering Materials & Structure, 1995, 18(5): 631–643
CrossRef
Google scholar
|
[10] |
Smith K N, Watson P, Topper T H. A stress-strain function for the fatigue of metals. Journal of Materials, 1970, 5: 767–778
|
[11] |
Ince A, Glinka G. A modification of Morrow and Smith-Watson-Topper mean stress correction models. Fatigue & Fracture of Engineering Materials & Structure, 2011, 34(11): 854–867
CrossRef
Google scholar
|
/
〈 | 〉 |