Bo Song, Yisen Wang, Wenlong Xiao, Chaoli Ma, Lian Zhou, Yanbiao Ren, Ruipu Li, Hui Chen, Hongyang Wang, Tianwen Zhen, Jiamu Fu, Baoyu Shi
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引用次数: 0
摘要
这项工作研究了加热温度对近 βTi 合金 Ti-5Al-3Mo-3V-2Cr-2Zr-1Nb-1Fe (wt.%) 的微观结构和摩擦学性能的影响。随着溶液温度的升高，原生α的体积分数逐渐降低，因此硬度和耐磨性也随之降低。经过时效处理后，合金的耐磨性明显提高。在时效过程中，二次α析出物随时效温度的升高而变粗。二次α析出物比一次α析出物更有效地强化合金。在与不锈钢的摩擦过程中，老化样品的磨损机制是磨料磨损、粘着磨损和氧化磨损的混合。利用 JmatPro 软件进行的热力学计算表明，α 沉淀的厚度增长率（v）与时效温度（T）服从 v = 489.1936 × 100.0424 T 的公式，实验结果也证明了这一点。α 相从 β 的转变与 BOR 关系{110}β//{0001}α 和 [111]β//[11\(\overline{2 }\) 0]α 相对应。
Effect of Heating Temperature on Microstructures and Tribological Properties of Near βTi Alloy
The influence of heating temperature on microstructures and tribological properties of near βTi alloy Ti-5Al-3Mo-3V-2Cr-2Zr-1Nb-1Fe (wt.%) has been studied in this work. The volume fraction of primary α decreases gradually with solution temperature increasing, and as a result, the hardness and wear resistance are reduced. After aging treatment, the wear resistance of alloy is obviously improved. During aging the secondary α precipitates coarsen with aging temperature increasing. Secondary α precipitates are more effective to strengthen alloy than primary α. During friction process with stainless steel, the wear mechanisms of aged samples are mixture of abrasive wear, adhesive wear, and oxidation wear. Thermodynamic calculation by JmatPro software shows that the thickness growth rate (v) of α precipitates and aging temperature (T) obey the formula of v = 489.1936 × 100.0424T, which is evidenced by experimental results. The transformation of α phase from β is corresponded with the BOR relationships, {110}β//{0001}α and [111]β//[11 \(\overline{2 }\) 0]α.
期刊介绍：
ASM International''s Journal of Materials Engineering and Performance focuses on solving day-to-day engineering challenges, particularly those involving components for larger systems. The journal presents a clear understanding of relationships between materials selection, processing, applications and performance.
The Journal of Materials Engineering covers all aspects of materials selection, design, processing, characterization and evaluation, including how to improve materials properties through processes and process control of casting, forming, heat treating, surface modification and coating, and fabrication.
Testing and characterization (including mechanical and physical tests, NDE, metallography, failure analysis, corrosion resistance, chemical analysis, surface characterization, and microanalysis of surfaces, features and fractures), and industrial performance measurement are also covered
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