Effect of Solid Solution Temperature on Microstructure and Tensile Properties of Ti-0.3Mo-0.8Ni Titanium Alloy AITranslate

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Chinese Library Classification Number:TG156.1[金属学及工艺—热处理]

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Ti-0.3Mo-0.8Ni titanium alloy was selected as the test material and subjected to solid solution treatment at different temperatures.The effects of solution temperature on the microstructure and tensile properties of Ti-0.3Mo-0.8Ni titanium alloy were studied by optical microscope(OM),scanning electron microscope(SEM),X-ray diffractometer(XRD)and tensile property test.The results show that the original microstructure of the alloy is an equiaxed microstructure formed by forging in the two-phase region,which is composed of a large number of primaryαphase(α_p)and a small amount ofβ-transformed microstructure(β_T).With the increase of solution temperature,theα_p phase in the microstructure of the solution-treated alloy gradually becomes smaller,and finally completely dissolves and disappears,while the content of the precipitatedα′phase increases and the size gradually increases.And the strength of the alloy increases,while the plasticity decreases.The fracture micro-morphology of the alloy changes from dimple to crystalline morphology,tear ridges gradually appear,and the fracture characteristic changes from ductile fracture to brittle fracture.