Effects of HIP Process on Microstructure and Tensile Properties of New High-temperature Ti Alloy ZTi700SR
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摘要: 以一种使用温度在700℃的新型高温钛合金材料为研究对象,研究了热等静压工艺(HIP)对其材料力学性能及微观组织性能的影响。结果表明:新型高温钛合金ZTi700SR的铸态组织为魏氏组织,组织特征为片层状α相+晶间β相+晶界α相,HIP使α相粗化;HIP后ZTi700SR钛合金的室温及高温抗拉强度略有降低,伸长率有所提高;HIP后,材料的抗拉断口韧窝尺寸减小,材料更加致密。Abstract: The effect of hot isostatic pressure on the mechanical properties and microstructure of a new high-temperature Ti alloy, ZTi700SR, used in 700℃ environment, is investigated. The results indicate that the microstructure of the as-cast ZTi700SR is widmanstatten structure, which is lamellar α+intergranular β+grain boundary α. After HIP, the lamellar α grows wider. After HIP, the tensile strength decreases lightly, and the elongation increases. The dimple size of the tensile fracture of ZTi700SR after HIP decreases, and the material becomes denser.
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Key words:
- high-temperature Ti alloy /
- casting /
- hot isostatic pressure /
- microstructure /
- tensile properties
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