open access

https://hdl.handle.net/2115/75135

Plastic Deformation Behavior in Pseudo-Binary Compound Ni3Al·Co3Ti Single Crystals

日本語

mechanical property

1992-08-01

日本金属学会

Journal of the Japan Institute of Metals

56(8)

943-951

Single crystalline Co3Ti base quarternary compounds, (Co, Ni)3(Ti, Al), are prepared and the effects of temperature, strain rate and orientation on the plastic behavior are investigated. Then the results are compared to other L12 intermetallic compounds being represented by Ni3Al. The differences found by the comparison are as follows. (1) Regardless of the crystallographic orientation with respect to the stress axis, there is a strong negative temperature dependence of strength at low temperature regime. (2) Plastic deformation is accompanied by serration on the stress strain curve and by metallic acoustic emission in the single crystals with near-[111] orientation and at temperature regime between 77 to 973 K where the anomalous positive temperature dependence of strength is observed. (3) For the same orientations, the temperature regime where cube slip governs the plastic deformation is narrow. (4) Octahedral viscous flow at the high temperature regime is not associated with well-defined yield drop. It is to be noted that the plastic behavior of Co3Ti base single crystals should also be discussed seperately in the above four regimes as has been done in other single crystalline L12 compounds.

学術雑誌論文

Version of Record

0021-4876

1880-6880

AN00062446