The high-temperature mechanical properties of 95W-3.5Ni- 1.5Fe and 95W-4.5Ni-0.5Co alloys were investigated in the temperature range of room temperature to1100℃.The yield strength and tensile strengths declined gradually,and the ductility of both alloys increased as the testing temperature was increased to 300℃.All the three properties reached a plateau at temperatures between 300 and 500℃ in the case of 95W-3.5Ni- 1.5Fe and at temperatures between 350 and 700℃ in the case of 95W-4.5Ni-0.5Co.Thereafter,the ductility as well as yield and tensile strengths decreased considerably.
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