Influences of solution temperature and subsequent cooling rate on microstructures and room temperature tensile properties of near α-TA19 alloy (Ti-6Al-2Sn-4Zr-2Mo-0.1Si) manufactured by laser metal deposition were investigated. The results show that after the solution and aging treatment, fine Basketweave structure of the as-fabricated TA19 alloy was transformed into Widmannstatten structure for the samples heat treated in the single β phase region and double lamellar special bimodal structure for those heat treated in the α+β two-phase region. The as-fabricated TA19 samples subjected to solution treatment at 1000 °C with subsequent oil cooling and aging treatment have a good synergy of strength and plasticity due to the best combination of the content and width of α_p and α_s+α’ martensite phases. Not only the widths of α_p and α_s/α’ martensite phases affect the yield stress of the alloy, but also the phase contents of the double lamellar special bimodal structure alloy play an important role. The rule of mixtures is developed to predict the yield stress of the LMD-fabricated TA19 alloy after heat treatment in the α+β two-phase region.

研究了固溶温度和随后的冷却速率对通过激光金属沉积制备的近α-TA19合金（Ti-6Al-2Sn-4Zr-2Mo-0.1Si）的组织和室温拉伸性能的影响。结果表明，固溶和时效处理后，TA19合金的精细Basketweave结构转变为在单β相区热处理的样品的Widmannstatten结构和在α相热处理的双层特殊双峰结构。 +β两相区域。将如此制造的进行固溶处理TA19样品在1000℃下，随后冷却油和时效处理具有强度和塑性的良好的协同作用由于α的内容和宽度的最佳组合_p和α_小号+α'马氏体相。不仅α的宽度_p和α_小号/α”马氏体相影响合金的屈服应力，而且双层状特殊双峰结构合金的相内容中发挥重要作用。制定了混合规则，以预测LMD制造的TA19合金在α+β两相区域中的热处理后的屈服应力。