Defect structures and nonbasal slip of C36 Laves phase MgNi{sub 2} in a two-phase alloy
- Massachusetts Inst. of Tech., Cambridge, MA (United States). Dept. of Materials Science and Engineering
The microstructure of the C36 Laves phase MgNi{sub 2} in a two-phase Ni-15 at. pct Mg alloy was studied using electron microscopy. Both intrinsic and extrinsic stacking faults were found on the basal plane. The displacement vectors of the faults and Burgers vectors of partial dislocations either lying on the basal faults or bounding each side of the faults were analyzed using high-resolution transmission electron microscopy (TEM). Nonbasal faults were found on the pyramidal planes {l_brace}10{bar 1}1{r_brace} and {l_brace}10{bar 1}2{r_brace} and the prismatic plane {l_brace}10{bar 1}0{r_brace}, all connected to basal faults. The displacement vector of the pyramidal faults was determined to be 1/12 {l_angle}40{bar 4}3{r_angle}. The microstructure was also studied after room-temperature compression, and nonbasal slip was found to be the major deformation model.
- DOE Contract Number:
- FG02-90ER45426
- OSTI ID:
- 78410
- Journal Information:
- Metallurgical Transactions, A, Vol. 26, Issue 6; Other Information: PBD: Jun 1995
- Country of Publication:
- United States
- Language:
- English
Similar Records
Domain boundaries in epitaxial wurtzite GaN
Slip, twinning and transformation in Laves phases. [Ti-TiCr[sub 2]; Fe-ZrFe[sub 2]; Ni-Cu-Mg containing MgNi[sub 2] and MgCu[sub 2]]