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Electro-strengthening of the additively manufactured Ti-6A1-4V alloy

机译：电力加固加固制造的Ti-6a1-4V合金

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Structure-property-processing relationship has been studied in additively manufactured Ti-6A1-4V alloy. The processing was performed using in-situ electron microscope (EM) at a moderate current density of 5 × 10~5 A/cm~2 applied for 5 min, and by suppressing Joule heating with massive heat sinks such that the temperature rise was ＜180 °C and the mechanical properties were not compromised. The results show that while the grain size increased by ～15%, the nanohardness increased by 16%. This is attributed to the pronounced dislocation generation, regeneration, and clustering as well as defect healing. Ultimately, there is a reduction in the residual strain and a significant increase in the intrinsic strength as evidenced by the high Taylor factor of the electric current processed specimen. This novel processing technique represents an alternative pathway for active controlling of microstructure and internal defects for parts that might be sensitive to high-temperature processing or conventional methods.
机译：在含有地加工制造的Ti-6a1-4V合金中研究了结构 - 性能处理关系。使用原位电子显微镜（EM）在5×10〜5a / cm〜2的中等电流密度下使用原位电子显微镜（EM）进行，并且通过抑制大量散热器的焦耳加热，使得温度升高< 180℃和机械性能没有损害。结果表明，虽然晶粒尺寸增加〜15％，但纳米型增加了16％。这归因于发音的脱位生成，再生和聚类以及缺陷愈合。最终，在电流加工样本的高泰勒因子的高泰勒因子证明的内在强度的降低和内在强度的显着增加。该新颖的处理技术代表了用于主动控制微观结构和内部缺陷的替代途径，其对高温处理或传统方法可能敏感的部件。

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