Development of Heat Treatments for Selective Laser Melting Ti6Al4V Alloy: Effect on Microstructure, Mechanical Properties, and Corrosion Resistance,Advanced Engineering Materials

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Development of Heat Treatments for Selective Laser Melting Ti6Al4V Alloy: Effect on Microstructure, Mechanical Properties, and Corrosion Resistance
Advanced Engineering Materials ( IF 3.4 ) Pub Date : 2020-06-03 , DOI: 10.1002/adem.202000359
Silvia Cecchel ₁ , Davide Ferrario ₁ , Giovanna Cornacchia ₂ , Marcello Gelfi ₂

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To evaluate the introduction of selective laser melting (SLM) for serial application, some features directly related to the components safety and performances are to be deeply analyzed. To this purpose, the present article applies three different types of heat treatment on Ti6Al4V as‐received samples produced by SLM: 1) annealing stress relieving, 2) solubilization super‐β transus, and 3) sub‐β transus followed by a tempering. Then, the related microstructures, mechanical resistance, residual stresses, and corrosion resistance are studied. The results identify a set of heat treatment parameters (super‐β transus followed by tempering), which guarantee the required properties. These samples show equiaxial grains composed of α + β phase, good mechanical properties, a high resistance to corrosion, and residual stresses almost null. Finally, this study confirms that Ti6Al4V made by SLM is applied in the transport field.

中文翻译：

选择性激光熔化Ti6Al4V合金的热处理技术发展：对组织，力学性能和耐蚀性的影响

为了评估选择性激光熔化（SLM）在串行应用中的应用，与组件安全性和性能直接相关的某些功能需要深入分析。为此，本文对通过SLM生产的Ti6Al4V样品进行了三种不同类型的热处理：1）消除退火应力，2）增溶超β基因，3）亚β基因然后进行回火。然后，研究了相关的显微组织，机械阻力，残余应力和耐腐蚀性。结果确定了一组热处理参数（super-βtransus，然后回火），这些参数保证了所需的性能。这些样品显示出由α+β相组成的等轴晶粒，良好的机械性能，高耐腐蚀性和残余应力几乎为零。最后，

更新日期：2020-06-03

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