open access

https://hdl.handle.net/2115/75146

High-Temperature Creep Behavior in Ni3(Al, Ta) Single Crystals with Different Orientations

英語

internal stress

1997-07

日本金属学会

Materials Transactions, JIM

38(7)

653-655

High temperature creep behavior of a nickel-rich Ni3(Al, Ta) with the L12 structure is investigated in order to clarify the influence of crystallographic orientation. The single crystals with four different orientations are deformed in compressive creep at the temperatures ranging from 1123 to 1273 K under a constant load with initial shear stresses being from 35 to 120 MPa for the (111)[\bar101] slip system. The results show a distinct orientation dependence of creep strength, although shape of creep curves, stress exponent and the activation energy seem to be independent on orientation. It is shown, however, that the internal stress measured by strain transient dip tests is found to be orientation-dependent and that the creep behavior is independent on orientation if these are analyzed with the effective stress instead of the applied shear stress.

学術雑誌論文

Version of Record

著作権は日本金属学会にある。利用は著作権の範囲内に限られる、

0916-1821

2432-471X

AA10699969