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| 1 | 铸态亚稳β钛合金高应变速率动态再结晶机理显示文摘针对铸态亚稳β型Ti-5553钛合金,基于热模拟试验,研究了合金在高温高应变速率条件下的热变形行为,并发现了一种全新的动态再结晶机制。结合多种材料表征技术,揭示了新动态再结晶机制的微观组织演变机理,并分析了变形参数对再结晶行为的影响。结果表明:亚稳β钛合金在高温高速率条件下的显著动态软化是动态再结晶和流变失稳共同作用的结果,动态再结晶产生新晶粒的形核位置、尺寸和组织占比都对热变形参数有较高的敏感性。本文发现和揭示的新动态再结晶机制是连续和不连续这两种常见机制混合而成的耦合机制,既包含了引发不连续动态再结晶的晶界应变集中效应,又包括了连续动态再结晶的亚晶旋转形核过程。 | 赵秦阳 陈永楠 徐义库 Rob TORRENS Leandro BOLZONI Fei YANG | 2022 | 中国有色金属学报2022，32，5： | 3 |
| 2 | Processing of metastable beta titanium alloy:Comprehensive study on deformation behaviour and exceptional microstructure variation mechanisms显示文摘Thermomechanical processing(TMP)is especially crucial for metastableβtitanium alloys,which has received significant attention in the community for a long time.In this contribution,the processing-responding behaviour including microstructure evolution process,texture variation mechanism,and un-derlying deformation process of powder metallurgy Ti-5553 alloy in a wide processing parameter range was comprehensively investigated.Thermal physical simulation was performed on the alloy at temper-atures ranging from 800℃ to 1100℃,and strain rates between 0.001 s^(−1) and 10 s^(−1),to varied defor-mation degrees of 20%-80%height reduction.It was found that the processing parameters(i.e.temper-ature,strain rate,and deformation degree)are influential on the deformation process and resultant mi-crostructure.Varied microstructural evolution processes forβphase including flow localization,dynamic recovery,dynamic recrystallization,and grain coarsening are activated in different processing domains,while different evolution mechanisms forαphase including dynamic precipitation,phase separation,dy-namic coarsening,and mechanical shearing also play their roles under different processing conditions.In particular,four exceptional evolution mechanisms ofαprecipitation which have not been previously reported in titanium alloys were discovered and clearly demonstrated,more specifically,they are multi-interior twinning,internal compositing,layered coarsening and selective diffusion-actuated separation.After the establishment of comprehensive microstructural evolution mechanism maps,the guidance for precise processing and the knowledge reserve extension for deformation process of metastableβtita-nium alloys can be effectively achieved. | Qinyang Zhao Leandro Bolzoni Yongnan Chen Yiku Xu Rob Torrens Fei Yang | 2022 | Journal of Materials Science & Technology2022，，31： | 1 |
| 3 | Genotype-phenotype correlations in families with deletions in the von Hippel-Lindau (VHL) gene显示文摘 | Frederik Hes Richard Zewald Ton Peeters Rolf Sijmons Thera Links Joke Verheij Gert Matthijs Eric Legius Geert Mortier Kors van der Torren Malou Rosman Cornelis Lips Peter Pearson Rob van der Luijt | 2000 | Human Genetics2000，，4： | 1 |
| 4 | 快速固结粉末冶金亚稳β钛合金的热加工性与组织性能显示文摘本研究设计了一种低成本短流程粉末冶金固结与加工技术制备了亚稳β型Ti-5553合金,主要包括快速粉末热压、单道次锻压和简单退火热处理。研究揭示了合金在加工过程中的组织演变机理、力学性能优化机理和组织性能关系。结果表明:经过在1275℃流动氩气气氛环境的快速热压,所得固结态合金相对密度高、宏微观组织均匀,无明显缺陷。经过单道次锻压及快速退火处理后,合金的微观组织和力学性能得以调控和优化,其微观组织和力学性能都对热处理温度的变化有较高的敏感性。当热处理温度为700℃和750℃时,合金展现出良好的强塑性匹配,抗拉强度和伸长率分别为1335 MPa和6.6%、1215 MPa和7.2%,原因是多级析出相的组织结构可同时稳固合金的力学性能强化效果、提高合金的均匀协调变形能力,使合金具有高强度和可接受的塑性。 | 赵秦阳 徐义库 陈永楠 Rob TORRENS Leandro BOLZONI Fei YANG | 2021 | 中国有色金属学报2021，31，12： | 1 |
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