Microstructural Evolution and Mechanical Properties of β-Titanium Ti-lOV-2Fe-3Al during Incremental Forming

Microstructural Evolution and Mechanical Properties of β-Titanium Ti-lOV-2Fe-3Al during Incremental Forming
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渐进成形过程中β-钛Ti-1OV-2Fe-3Al 的微观结构演变和力学性能

DOI:
10.1002/9781118356074.ch104
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发表时间:
2012
期刊:
影响因子:
--
通讯作者:
M. F.-X. Wagner
M. F.-X. Wagner
中科院分区:
--
文献类型:
--
作者:
S. Winter;S. Fritsch;M. F.-X. Wagner

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形成高强度β钛合金的中空轴在技术上要求很高,并且昂贵。降低成本的一种方法是通过旋转挤出的增量成形。与深孔钻削(40%)相比,该工艺的优势在于材料利用率高(80%)。在这项研究中,我们研究的微观组织演变和机械性能的Ti-10 V-2Fe-3Al空心轴形成的旋转挤压,这导致不同的应力-应变行为在整个壁厚。观察到从> 1 μm(边缘)到100 μm(中心)的晶粒细化。随后的热处理可用于在整个轴的横截面上实现均匀的性能。甚至更高的强度与初生α相的沉淀有关。我们对高强度β钛合金Ti-10 V-2Fe-3Al的研究结果表明,旋转挤压结合适当的热处理,可以以较低的成本生产出性能更好的空心轴。
Forming of hollow shafts of high-strength beta titanium alloys is technologically demanding, as well as expensive. One approach to reduce costs is incremental forming by spin extrusion. The advantage of this process is the high utilization of material (80%) in comparison to deep-hole drilling (40%). In this study, we investigate the microstructural evolution and the mechanical properties of a Ti-10V-2Fe-3Al hollow shaft formed by spin extrusion, which results in varying stress-strain behavior across the wall thicNness. Grain refinement from> 1 μm (edge) to 100 μm (center) is observed. Subsequent heat treatments can be used to achieve homogeneous properties throughout the shaft’s cross section. Even higher strengths are associated with the precipitation of primary α-phase. Our results for the high-strength beta titanium alloy Ti-10V-2Fe-3Al illustrate the potential of spin extrusion, combined with suitable heat treatments, to produce hollow shafts with improved properties at lower costs.
Ti-10V-2Fe-3Al β 钛合金中的疲劳裂纹扩展:显微组织和裂纹尾迹粗糙体接触的作用
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