Isothermal hot deformation behaviour of metastable β titanium alloy Ti-10V-2Fe-3AI
Isothermal hot deformation behaviour of metastable β titanium alloy Ti-10V-2Fe-3AI
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DOI：
10.1179/mst.1997.13.7.575
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发表时间：
1997-07
影响因子：
1.8
通讯作者：
D. Robertson;H. Mcshane
中科院分区：
文献类型：
--
作者：
D. Robertson;H. Mcshane
通过热压缩试验，确定了亚稳β钛合金Ti-10V-2Fe-3Al在β和(α+β)相场中等温变形的高温真应力-真应变曲线。在两种初始微观结构条件下，合金的流动应力行为与热变形过程中发生的微观结构变化相关。等温热变形应力-应变曲线的形状很大程度上取决于材料的起始微观结构。 β场变形过程中的有效恢复机制是动态恢复，因为在β锻造条件下很容易观察到β亚晶。 β 相的动态恢复也被认为是 (α + β) 场高温变形期间两种微观结构条件的主要恢复机制。
Elevated temperature true stress-true strain curves have been determined for the isothermal deformation of the metastable β titanium alloy Ti-10V-2Fe-3Al in both the β and (α + β) phase fields using hot compression testing. The flow stress behaviour of the alloy, in two initial microstructural conditions, has been correlated with the microstructural changes taking place during hot deformation. The shape of the isothermal hot deformation stress-strain curve is strongly dependent upon the starting microstructure of the material. The operative restoration mechanism during deformation in the β field isdynamic recovery since β subgrains are readily observed in the as β forged condition. Dynamic recovery of the β phase is also considered to be the dominant restoration mechanism for both microstructural conditions during deformation at temperatures high in the (α + β) field.