Statistical studies of the chemical composition (alloying element and impurity contents, aluminum and molybdenum equivalents), polymorphic transformation temperature, structure (globular, lamellar, transition, mixed, basket-weave), and standard mechanical properties (tensile strength, elongation, reduction of area, impact strength, hardness) of rolled bars 15–150 mm in diameter, prepared from titanium alloy VT6 in 2013–2017 are performed. Various types of structure are obtained by changing deformation regime and simple annealing (600–920°С, 20–180 min, air cooling). Correlation relationships of mechanical properties with various factors are analyzed. It is established that the mechanical properties of bars with globular, transitional, and mixed structures are more dependent on fluctuations in grade composition and annealing regime than on the type of structure. Multivariant regression dependences are proposed for evaluating mechanical properties from alloying element and impurity equivalents for aluminum and molybdenum, the difference between polymorphic transformation and annealing temperatures, annealing time, and bar diameter.

中文翻译：

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VT6钛合金轧制棒材力学性能预测

化学成分（合金元素和杂质含量、铝和钼当量）、多晶型转变温度、结构（球状、层状、过渡、混合、篮状组织）和标准机械性能（抗拉强度、伸长率、收缩率）的统计研究对 2013-2017 年用钛合金 VT6 制备的直径为 15-150 毫米的轧制棒材进行面积、冲击强度、硬度）。通过改变变形方式和简单退火（600-920°С，20-180 分钟，空气冷却）可以获得各种类型的结构。分析了力学性能与各种因素的相关关系。已确定具有球状、过渡性、和混合结构更依赖于品位成分和退火制度的波动，而不是结构类型。提出了多元回归相关性，用于从铝和钼的合金元素和杂质当量、多晶型转变与退火温度、退火时间和棒材直径之间的差异来评估机械性能。