Practical design of Ni{sub 3}Al with high hot workability
- Shanghai Jiao Tong Univ. (China). Dept. of Materials Science and Engineering
From the previous work, Ni{sub 3}Al polycrystals with combined addition of magnesium and silicon kept high values of compressive strain at rupture (CSR) when the strain rate rose. In order to further improve hot workability of Ni{sub 3}Al, 7.9 wt.% Cr was added. The compressive tests showed that 30%--40% CSR values of the alloy had been kept in a wide temperature range of 1,173 K--1373 K at strain rates of 10{sup {minus}2}sec{sup {minus}1} and 10{sup {minus}1}sec{sup {minus}1} in contrast with 15%--25% CSR values of the alloy without Cr addition. In practical hot rolling process, at initial deformation temperature of 1,373 K, strain rate of 1.0 sec{sup {minus}1} and by controlling reduction within 10--15% each rolling pass, Ni{sub 3}Al ingots were successfully hot-rolled into polycrystals with different deformations, the maximum of which was 55%. The deformed alloys had manifestly enhanced mechanical properties shown by tensile tests. The dislocation configurations of deformed alloys have been investigated by using transmission electron microscope (TEM).
- OSTI ID:
- 571846
- Report Number(s):
- CONF-961202-; TRN: IM9806%%115
- Resource Relation:
- Conference: 1996 Fall meeting of the Materials Research Society (MRS), Boston, MA (United States), 2-6 Dec 1996; Other Information: PBD: 1997; Related Information: Is Part Of High-temperature ordered intermetallic alloys VII; Koch, C.C. [ed.] [North Carolina State Univ., Raleigh, NC (United States)]; Liu, C.T. [ed.] [Oak Ridge National Lab., TN (United States)]; Stoloff, N.S. [ed.] [Rensselaer Polytechnic Inst., Troy, NY (United States)]; Wanner, A. [ed.] [Univ. Stuttgart (Germany)]; PB: 799 p.; Materials Research Society symposium proceedings, Volume 460
- Country of Publication:
- United States
- Language:
- English
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