8.5Nb–TiAl alloy with fine grains
8.5Nb–TiAl alloy with fine grains
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DOI：
10.1016/s0925-8388(03)00427-4
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发表时间：
2003-10
影响因子：
6.2
通讯作者：
Y. Q. Yan;Liqun Zhou;W. Wang;Yan Zhang
中科院分区：
文献类型：
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作者：
Y. Q. Yan;Liqun Zhou;W. Wang;Yan Zhang
介绍了一种名义化学成分为Ti-45Al-8.5Nb-0.3W-0.3B-0.05Yat%(TAWBY)的8.5Nb-TiAl基合金。该合金为铸态组织，尺寸为25μm，合金中存在β(B2)相。通过常温和高温拉伸试验、断裂韧性试验和塑性行为试验对材料的力学性能进行了测试。最后，用光学显微镜、透射电子显微镜和扫描电子显微镜对样品的微观结构和物相分析进行了观察。比较了TAWBY合金与Ti-46Al-5Nb-1W、Ti-48Al-8Nb-1B、Ti-44Al-4Nb-4Zr-1B、Ti-47Al-2Nb-2Cr-4Ta和K5合金的力学性能。结果表明，TAWBY合金性能最好。在相同条件下，TAWBY合金表现出与K5等合金相同的完美性能。
One 8.5Nb–TiAl-based alloy, whose nominal chemical composition is Ti–45Al–8.5Nb–0.3W–0.3B–0.05Y at% (TAWBY) was presented, including various annealing treatments after cladding insulting forged with homogeneous microstructures. This alloy was developed as cast grains with the size of 25 μm whereas the β (B2) phase exists in TAWBY alloy. The mechanical properties were conducted in the field of tensile tests at ambient and elevated temperature, fracture toughness, and plasticity behavior tests. Finally, the microstructures and phase analysis were also observed by OM, TEM and SEM methods. The mechanical properties for TAWBY alloy were compared with Ti–46Al–5Nb–1W, Ti–48Al–8Nb–1B, Ti–44Al–4Nb–4Zr–1B, Ti–47Al–2Nb–2Cr–4Ta and K5 alloys. TAWBY alloy was shown to have the best properties. Under the same conditions, TAWBY alloy exhibits the same perfect properties as the K5 alloy and so on.