Abstract

Effects of processing parameters on the temperature field and axial shortening of linear-friction-welded joint of TC11 and TC17 titanium alloys are investigated by numerical simulation and experimental methods. The 2D model, which is simplified as a rigid body and a deformable body, is built on the basis of the LFW principle by ABAQUS/explicit software. LFW experiments are developed to verify the rationality of the model by measuring the temperature field and axial shortening. The results show that, during the friction phase, the temperature rises linearly with increasing friction time and decreasing axial shortening, heating rates slightly increase with increasing friction pressures and decrease with increasing amplitudes, and cooling rates increase with increasing friction pressures and amplitudes in the forging phase. The unilateral axial shortenings of TC11 and TC17 increase nearly linearly with increasing power input. The appropriate power input for the welded joint is measured to be in the range of 2.4 × 10⁷ to 3.36 × 10⁷ W/m² based on the tensile properties and fracture morphologies. The corresponding microstructure of the welded zone (WZ) consists of a large number of fine lath martensites α′ on the TC11 side and coarsened β phases with a small amount of precipitations on the TC17 side.

中文翻译：

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TC11与TC17合金线性摩擦焊接功率输入的数值与实验研究。

摘要

通过数值模拟和实验方法研究了工艺参数对TC11和TC17钛合金线性摩擦焊接接头温度场和轴向缩短的影响。通过ABAQUS / explicit软件基于LFW原理建立了简化为刚体和可变形体的2D模型。开发了LFW实验以通过测量温度场和轴向缩短来验证模型的合理性。结果表明，在摩擦阶段，温度随摩擦时间的增加和轴向缩短的减小而线性增加，加热速率随摩擦压力的增加而略有增加，随振幅的增加而降低，冷却速度随摩擦压力和锻件的增加而增加。相。TC11和TC17的单向轴向缩短量随功率输入的增加而线性增加。焊接接头的适当功率输入经测量为2.4×10⁷至3.36×10 ⁷  W / m ²基于拉伸性能和断裂形态。焊接区（WZ）的相应显微组织由TC11侧的大量细板条马氏体α '和TC17侧的少量β相粗化组成。