Orientation‐dependent mechanical responses in molybdenum‐rhenium alloys evaluated via micro‐pillars

Abstract

Textures in molybdenum‐rhenium (Mo‐Re) alloys are inevitable during thermal fabrication. [110] and [100] are common orientations in Mo‐Re alloys and effect mechanical responses. However, orientation dependence of mechanical responses in Mo‐Re alloys is not quite clear yet. To clarity this problem, micro‐pillar compression tests are conducted in grains with orientation [100] and [110] separately. Orientation‐dependent compressive properties are found in Mo‐14Re and Mo‐42Re (wt.%), but are not found in Mo and Mo‐5Re, which may be attributed to activated multi‐slip planes as increased Re. Solid solution effect of Re not only relies on orientations, but also on Re contents. Softening effect occurs in both [100] and [110] Mo‐5Re. while, strong strengthening effect happens in [110] Mo‐14Re and Mo‐42Re. Our research clarifies that Mo‐Re alloys with [110] orientation/texture could be preferred to obtain good strengthening effect.