| Microstructure and mechanical properties of high strength as—cast Ti—15—3 alloy |
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| 引用本文： | 丁宏升,周建中,贾均,郭景杰,苏彦庆,傅恒志.Microstructure and mechanical properties of high strength as—cast Ti—15—3 alloy[J].中国有色金属学会会刊,2002,12(3):445-449. |
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| 作者姓名： | 丁宏升 周建中 贾均 郭景杰 苏彦庆 傅恒志 |
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| 作者单位： | StateKeyLaboratoryofPrecisionHotProcessingofMetals,HarbinInstituteofTechnology,Harbin150001,China |
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| 基金项目： | 国家重点基础研究发展计划(973计划) |
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| 摘 要： | The effects of heat treatment and solidification cooling rate on the microstructure and mechanical properties of as-cast Ti-15-3 alloy prepared by induction skull melting method were investigated.Results show that the microstructure of as-cast Ti-15-3 alloy changes from the features of simplified and larger size of beta grains to finer grain size with increasing solidification cooling rate.After solution treatment and different ageing treatment,alpha phase precipitates in grains interior as well as in grain boundaries.Due to the modification of the precipitate phase,the tensile stength and elongation of the alloy are improved simultaneously.A good combination of the values of 1.406GPa of σb and 4.5% of δ was obtained,which will be satisfied the use of this kind of alloy in critical areas.
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| 关 键 词： | 高强度钛合金 铸造合金 机械性质 显微结构 |
Microstructure and mechanical properties of high strength as-cast Ti-15-3 alloy |
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| Abstract: | The effects of heat treatment and solidification cooling rate on the microstructure and mechanical properties of as-cast Ti-15-3 alloy prepared by induction skull melting method were investigated. Results show that the microstructure of as-cast Ti-15-3 alloy changes from the features of simplified and larger size of beta grains to finer grain size with increasing solidification cooling rate. After solution treatment and different ageing treatment, alpha phase precipitates in grains interior as well as in grain boundaries. Due to the modification of the precipitate phase, the tensile strength and elongation of the alloy are improved simultaneously. A good combination of the values of 1.406GPa of σb and 4.5% of δ was obtained, which will be satisfied the use of this kind of alloy in critical areas. |
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| Keywords: | cast Ti 15 3 alloy solidification cooling rate heat treatment microstructure mechanical properties |
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