在β锻TA15两相钛合金中的变形带（英文）

发布时间：2018-03-13 12:25

本文选题：TA钛合金　切入点：β锻　出处：《Transactions of Nonferrous Metals Society of China》2017年11期 　论文类型：期刊论文

【摘要】：为了研究在β锻TA15两相钛合金中的变形带,在Gleeble 3500热模拟实验机上进行热模拟压缩试验,同时通过光学显微镜(OM)和电子背散射衍射(EBSD)对显微组织进行研究。研究发现:在TA15钛合金β变形中,变形带在温度高达0.7T_m(T_m为熔点)时仍是重要的组织细化机制。变形带的边界可以是尖锐或者连续变化的。尖锐的变形带界面能够阻碍不连续动态再结晶形核,从而抑制再结晶的发生,而连续变化的界面是连续动态再结晶产生之处。变形带在高应变速率和初始粗晶组织中更加明显。分裂后的晶粒宽度对应变速率敏感,但受温度和初始晶粒尺寸影响较小。多向锻造产生交织的变形带可用于细化小型锻件的组织。
[Abstract]:In order to study the deformation band in 尾 -forged TA15 two-phase titanium alloy, a thermal simulation compression test was carried out on a Gleeble 3500 thermal simulator. At the same time, the microstructure of TA15 titanium alloy was studied by optical microscope and electron backscatter diffraction (EBSD). Deformation zone is still an important mechanism of microstructure refinement when temperature is up to 0.7 T / m). The boundary of deformation zone can be sharp or continuous. Sharp deformation band interface can hinder dynamic recrystallization nucleation. Thus the occurrence of recrystallization is inhibited, and the continuously changing interface is where the continuous dynamic recrystallization occurs. The deformation zone is more obvious in the high strain rate and initial coarse grain structure. The grain width after splitting is sensitive to the strain rate. However, the effect of temperature and initial grain size is small. The interwoven deformation band produced by multi-direction forging can be used to refine the microstructure of small forgings.
【作者单位】：西北工业大学材料学院凝固技术国家重点实验室;
【基金】：Projects(51205317,51575449)supported by the National Natural Science Foundation of China;Project(50935007)supported by the National Natural Science Foundation of China for Key Program Project(3102015AX004)supported by the Fundamental Research Funds for the Central Universities,China Project(104-QP-2014)supported by the Research Fund of the State Key Laboratory of Solidification Processing,China
【分类号】：TG146.23

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