Mechanical properties and determination of slip systems of the B2 YZn intermetallic compound
Single crystal specimens of YZn (B2) were tested in tension at room temperature. Specimens with a [1 0 1] tensile axis orientation exhibited {r_brace}0 1 1{l_brace} <100> primary slip and an ultimate tensile strength of 365MPa at 3.7% elongation. Specimens with [0 0 1] and [1 1 1] tensile axis orientations showed no slip lines and fractured at a stress of 180MPa at 3.3% and 130MPa at 2.9% elongation, respectively. Transmission electron microscopy (TEM) examination of the Burger's vector of dislocations in tensile tested specimens revealed <1 0 0>-type dislocations. TEM analysis suggested that a secondary slip system, {l_brace}0 0 1{r_brace}<1 0 0>, may be active. Banded features with a {l_brace}0 2 1{r_brace} orientation were observed in deformed YZn; these may be slip traces produced by the cross-slip of <1 0 0> dislocations. Acting together, {l_brace}0 1 1{r_brace} <1 0 0> and {l_brace}0 0 1{r_brace} <1 0 0> slip provide only three independent slip systems, and no extra independent systems are provided by the cross-slip. This finding is consistent with the low ductility of YZn.
- Research Organization:
- Ames Lab., Ames, IA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- DE-AC02-07CH11358
- OSTI ID:
- 985553
- Report Number(s):
- IS-J 7555; TRN: US201016%%2048
- Journal Information:
- Acta Materialia, Vol. 58, Issue 12
- Country of Publication:
- United States
- Language:
- English
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