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首页> 美国政府科技报告 >Microstructural Evolution of Commercial-Purity Ti and Superplasticity of Ti-6Al-4V Alloy Processed by Equal Channel Angular Extrusion
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Microstructural Evolution of Commercial-Purity Ti and Superplasticity of Ti-6Al-4V Alloy Processed by Equal Channel Angular Extrusion

机译：等通道角挤压工艺纯钛的微观组织演变及Ti-6al-4V合金的超塑性

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This project focused on deformation processing, microstructural development, and mechanical properties of Ti and Ti-6Al-4V alloys. Specific tasks included: (1) Study superplastic deformation of a Ti-6Al-4V alloy that have been processed by equal channel angular extrusion and relate the deformation mechanism to the enhancement of superplasticity, and (2) Examine the effect of strain path for Ti fabricated by equal channel angular extrusion and uniaxial compression, with a special focus on the improved mechanical properties of the deformed Ti. As a part of the report, two papers were published in Materials Science and Engineering A (vol.A410-411, 2005, 156-159) and Metallurgical and Materials Transactions A (vol.37, 2006, 381-391). The work was begun under AOARD 034023, 'Microstructure development of ultrafine grained Ti and superplasticity of Ti-6Al-4V alloy.' Most of that effort was devoted to Ti-6Al-4V alloy. Much progress has been made over the more than two years of effort. We propose to complete our studies by studying, in detail, deformation mechanisms for the enhanced superplasticity in the ultrafine grained Ti-6Al-4V alloy with a special focus on the role of non-equilibrium grain boundaries.

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