文献类型：期刊文献

英文题名：Research on the Dynamic Mechanical Behavior and Machining Mechanism of TC4 Titanium Alloy

作者：Zhang, Ping[1]; Ge, Shuai[1]; Zhang, Songting[1]; Jiang, Xiaomin[1]

机构：[1] College of Mechanical and Power Engineering, Guangdong Ocean University, Zhanjiang, China

年份：2025

外文期刊名：Journal of Materials Engineering and Performance

收录：EI(收录号：20254419416564)

语种：英文

外文关键词：ABAQUS - Cutting - Cutting tools - Dynamics - Shear flow - Stress-strain curves - Titanium alloys - Turning

外文摘要：This research investigates the dynamic mechanical behavior and cutting mechanisms of TC4 titanium alloy. Utilizing stress–strain relationships, the Johnson–Cook constitutive parameters were calibrated and subsequently employed to construct an ABAQUS finite element model for simulating the cutting process of TC4 alloy. The material’s dynamic impact response was analyzed through true stress–strain curves obtained under varying temperatures and strain rates. Furthermore, single-factor cutting experiments were conducted to evaluate the influence of cutting speed (vc), depth of cut (ap), and tool rake angle (α) on tool temperature, as well as on the evolution of maximum equivalent stress and strain in the shear zone. The findings demonstrate that the yield stress of TC4 alloy exhibits a positive correlation with strain rate across all tested temperatures. In the lower temperature range (20-220?°C), the increment in yield stress diminishes from 105?MPa to approximately 53?MPa with increasing strain rate. At constant strain rates, the yield stress generally decreases as temperature rises, except between 320?°C and 420?°C, where it increases by nearly 110?MPa. Cutting speed was found to be the dominant factor affecting tool temperature, which increased from 67.6?°C to 306.5?°C as the cutting speed rose from 166?mm/min to 500?mm/min. Moreover, the internal thermal gradient of the tool propagated from the cutting edge inward in a ripple-like fashion with increasing speed. In the shear zone, cutting speed exerted the greatest influence on equivalent stress, producing a 10.46% increase as the speed was elevated from 333?mm/min to 416?mm/min. The stress distribution near the shear band expanded, and chip fragmentation intensified under higher cutting speeds. Conversely, the maximum equivalent strain in the shear zone was significantly reduced (by 13.49%) when the cutting speed increased from 333?mm/min to 416?mm/min. Variations in depth of cut (ap) and tool rake angle (α) showed negligible effects on equivalent strain, which remained predominantly concentrated in the chip region and along the machined surface, following the shear slip line. ? ASM International 2025.