Enhanced superplasticity for (α plus β)-hot rolled Ti-6Al-4V-0.1B alloy by means of dynamic globularization

被引：47

作者：

Roy, Shibayan ^{[1
]}

Suwas, Satyam ^{[1
]}

机构：

[1] Indian Inst Sci, Dept Mat Engn, Bangalore 560012, Karnataka, India

来源：

MATERIALS & DESIGN | 2014年 / 58卷

关键词：

Ti-6Al-4V alloy; Boron addition; Superplasticity; Dynamic globularization; Dynamic coarsening; Cavitation; CAST TITANIUM-ALLOYS; MECHANICAL-PROPERTIES; BORON ADDITION; HOT-WORKING; MICROSTRUCTURAL EVOLUTION; DEFORMATION MECHANISMS; COARSENING BEHAVIOR; TENSILE PROPERTIES; TEXTURE EVOLUTION; STRAIN-RATE;

D O I：

10.1016/j.matdes.2014.01.033

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Thermo-mechanically processed Ti-6Al-4V alloy, with (0.1 wt.%) and without boron addition, has been subjected to tensile test under superplastic deformation conditions (Temperature, T = 850 degrees C and initial strain rate, (epsilon) over dot = 3 x 10(-4) s(-1)). The boron added alloy exhibited higher elongation (similar to 430%) in comparison to the base alloy without boron (similar to 365%). Superior ductility of the boron added alloy has been attributed to an enhanced alpha/beta interfacial boundary sliding. This was caused by riotous dynamic globularization leading to the abundant presence of equiaxed primary alpha grains with refined sizes and narrow distribution in the deforming microstructure. Cavities do occur around TiB particles during deformation; the cavities are, however, extremely localized and do not cause macroscopic cracking. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：52 / 64

页数：13

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