The manufacturing of titanium alloy components is of great significance for many industrial applications. High-performance titanium alloy parts are generally produced by a serial operation of hot forging process and extensive machining. Recently, additive manufacturing (AM) technologies such as direct laser deposition (DLD) has been developed to produce net-shape components. In this study, the parts were fabricated by depositing TA15 titanium alloy powders via DLD process on forged TC17 titanium alloy plates. Microstructure, microhardness and tensile properties of as-fabricated sample were examined. By using digital image correlation (DIC), the strain fields as well as the global strain behavior of the tensile specimen have been analyzed. The sample consists of three typical zones: the laser deposited zone (LDZ), the forged substrate zone (SZ), and the heat affected zone (HAZ) with good metallurgical bonding. Superfine basketweave microstructure forms within β grains in LDZ and HAZ because of fast cooling rate. The as-fabricated specimens have good tensile properties with an average ultimate tensile strength of 1027 MPa and average elongation of 4.57%. Non-uniform local strain concentration occurs in LDZ, while no strain concentration is found in HAZ and SZ. The remarkable non-uniformity of plastic strain is ascribed to different microstructures.

钛合金部件的制造对于许多工业应用具有重要意义。高性能钛合金零件通常通过热锻工艺和大量机加工的一系列操作来生产。近来，已经开发了诸如直接激光沉积（DLD）之类的增材制造（AM）技术来生产网状部件。在这项研究中，零件是通过DLD工艺在锻造的TC17钛合金板上沉积TA15钛合金粉末而制成的。检查了所制备样品的显微组织，显微硬度和拉伸性能。通过使用数字图像相关性（DIC），分析了拉伸试样的应变场以及整体应变行为。样品由三个典型区域组成：激光沉积区域（LDZ），锻造基材区域（SZ），以及具有良好冶金结合的热影响区（HAZ）。由于冷却速度快，LDZ和HAZ的β晶粒内形成了超细的篮状组织。制成的试样具有良好的拉伸性能，平均极限拉伸强度为1027 MPa，平均伸长率为4.57％。LDZ中出现不均匀的局部应变浓度，而在HAZ和SZ中未发现应变浓度。塑性应变的显着不均匀性归因于不同的微观结构。LDZ中出现不均匀的局部应变浓度，而在HAZ和SZ中未发现应变浓度。塑性应变的显着不均匀性归因于不同的微观结构。LDZ中出现不均匀的局部应变浓度，而在HAZ和SZ中未发现应变浓度。塑性应变的显着不均匀性归因于不同的微观结构。