激光熔化沉积TA15＋Ti2AlNb合金的组织与力学性能
将TA15和Ti_2AlNb合金粉末以不同比例预混,采用激光熔化沉积工艺,制备出40%TA15＋60%Ti_2AlNb,50%TA15＋50%Ti_2AlNb,60%TA15＋40%Ti_2AlNb（质量分数）3种比例的合金薄壁,分析了薄壁的成分、组织及力学性能。结果表明：3种沉积薄壁的成分分布均匀,合金由α相、α2相及β/B2相组成,针状α相和α2相呈网篮状分布在初生β/B2晶粒内部;3种合金的抗拉强度分别为1108 MPa,1071 MPa,1105 MPa,断裂伸长率分别为3.0%,2.2%,3.8%;拉伸断口可见沿α2相撕裂产生的撕裂棱,断裂方式均为准解理断裂。...
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| Published in | 航空材料学报 Vol. 37; no. 3; pp. 61 - 67 |
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| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
北京有色金属研究总院 复合材料中心,北京,100088
2017
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| Subjects | |
| Online Access | Get full text |
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| Summary: | 将TA15和Ti_2AlNb合金粉末以不同比例预混,采用激光熔化沉积工艺,制备出40%TA15＋60%Ti_2AlNb,50%TA15＋50%Ti_2AlNb,60%TA15＋40%Ti_2AlNb（质量分数）3种比例的合金薄壁,分析了薄壁的成分、组织及力学性能。结果表明：3种沉积薄壁的成分分布均匀,合金由α相、α2相及β/B2相组成,针状α相和α2相呈网篮状分布在初生β/B2晶粒内部;3种合金的抗拉强度分别为1108 MPa,1071 MPa,1105 MPa,断裂伸长率分别为3.0%,2.2%,3.8%;拉伸断口可见沿α2相撕裂产生的撕裂棱,断裂方式均为准解理断裂。 |
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| Bibliography: | laser melting deposition ; titanium alloy ; microstructure ; mechanical properties LIU Yantao,ZHANG Yongzhong, CHEN Yiqiang, TANG Yangjie（Center for Composites, General Research Institute of Nonferrous Metals, Beijing 100088, China） Three different proportions of TA15 and Ti2AlNb alloy powde were premixed and thin-walls with proportions of 40%TA15 ＋ 60%Ti2AlNb, 50%TA15 ＋50% Ti2AlNb and 60%TA15 ＋40%Ti2AlNb （mass fraction） were prepared by using laser melting depo-sition process. The composition, microstructure and mechanical properties of the three thin-walls were analyzed. The results indicate that the compositions of all the three kinds of alloys are uniform. The alloy appears as basketweave microstructure with acicular a phase and a2 phase distributing within primary p/B2 grain. Tensile strength of the three kinds of alloys are 1108 MPa and 1071 MPa, 1105 MPa, and elongation are 3. 0% , 2. 2% and 3. 8% respectively; Tear ridge along a 2 phases is visible on tensile fracture surface, and the fracture mode is s |
| ISSN: | 1005-5053 |
| DOI: | 10.11868/j.issn.1005-5053.2016.00052 |