Mechanical properties of recrystallized L12-type Ni3(Si,Ti) intermetallics
Journal of Materials Science(1991)
摘要
The mechanical properties of the Ni(Si, Ti) alloys undoped and doped with 50 p.p.m. boron, both of which were polycrystalline specimens prepared by recrystallization, were investigated by tensile testing. The yield stress was found to increase with increasing test temperature to a maximum at 800 K, followed by a decrease. The tensile elongation was highest at room temperature and tended to decrease with increasing temperature for both alloys, but was consistently higher in the boron-doped Ni(Si, Ti) alloys than in the undoped ones over all the test temperatures. The change in the ultimate tensile stress (UTS) with temperature was similar to that of tensile elongation. The transgranular fracture became dominant as the elongation increased, regardless of the alloys and the testing temperature. Thus, this work again verified that the alloying method proposed by the present authors is useful for improving the grain-boundary cohesion of L1-type ordered alloys.
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关键词
Polymer,Mechanical Property,Boron,Recrystallization,Tensile Testing
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