کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1580576 | 1514832 | 2010 | 6 صفحه PDF | دانلود رایگان |

The purpose of the present work is to build the relationship between impression creep and conventional uni-axial tensile creep in determining crystallographic creep parameters for face centered cubic (FCC) nickel-based single crystal superalloys. To this aim, the impression creep performed on [0 0 1]-, [0 1 1]-, and [1 1 1]-oriented nickel-based single crystal superalloys were respectively investigated and the data was compared with those obtained with uni-axial tensile creep counterparts. It shows that the determination of crystallographic creep stress exponent is independent of crystallographic orientations, and the results agree reasonably well between impression creep and uni-axial tensile creep. However, some reveres dependence of crystallographic orientation was observed between impression creep and uni-axial tensile creep, such as the steady-state punch velocity for impression creep and steady-state elongation rate for uni-axial tensile creep, and this induced different stress conversion factors among different crystallographic orientations.
Journal: Materials Science and Engineering: A - Volume 527, Issues 7–8, 25 March 2010, Pages 1850–1855