Effect of the Heat Treatment Process on Machinability of TC4 Alloy

2011 ◽  
Vol 320 ◽  
pp. 64-68 ◽  
Author(s):  
Li Jun Pang ◽  
Tan Ji Yu ◽  
Zong Ling Cao
Keyword(s):  
Titanium Alloy ◽  
Cutting Force ◽  
Treatment Process ◽  
Orthogonal Design ◽  
Regression Equations ◽  
Technical Parameters ◽  
Tc4 Titanium Alloy ◽  
Tc4 Alloy ◽  
Multiple Variable ◽  
Turning Parameter

The orthogonal design approach is adopted to perform the cutting force experiment. It is based on the three typical metallographic phases of TC4 titanium alloy. The multiple-variable linear regression equations of the cutting force are built in term of the main technical parameters using the MINITAB software. Regression analysis is done, and an accurate empirical formula of TC4 cutting force is established. It is also optimized the cutting process parameters. The heat treatment’s technical laws of cutting force of TC4 titanium alloy are further undertaken, which provide a theoretical basis for improving cutting performance and optimizing turning parameter.

Microstructure and Mechanical Properties of TC4 Titanium Alloy Subjected to High Static Magnetic Field

2017 ◽  
Vol 898 ◽  
pp. 345-354 ◽  
Author(s):  
Gui Rong Li ◽  
Fang Fang Wang ◽  
Hong Ming Wang ◽  
Jiang Feng Cheng
Keyword(s):  
Magnetic Field ◽  
Titanium Alloy ◽  
Dislocation Density ◽  
Static Magnetic Field ◽  
Micro Hardness ◽  
Tc4 Titanium Alloy ◽  
Tc4 Alloy ◽  
Deformation Ability ◽  
Magnetic Induction Intensity ◽  
The Magnetic Field

The TC4 titanium alloy was subjected to high static magnetic field (HSMF) treatment with different magnetic induced intensities (B=0、1T、2T、3T、4T、5T、6T and 7T). The effects of B on the texture, dislocation density, grain size, tensile properties and micro-hardness of TC4 titanium alloy were investigated, and the influence mechanism of magneto-plastic effect on the plastic deformation ability of titanium alloy was also been studied. The results showed that the dislocation density had been increased after the HSME treatment. It reached a maximum when B=2 T, which was enhanced by 1.6 times compared to that of the untreated samples. In the view of quantum scale,the magnetic field promoted the transition of radical pairs from singlet to triplet state, which caused the movement of dislocation, led to the dislocation depinning from the depinning center, and increased the flexibility of dislocation. Subsequently, the inevitability of optimized 2T parameter was further discussed in the dislocation pile-up. Furthermore, the magnetic field not only promoted the orientation preference of crystal plane along the slipping direction, but also had the effect on the grain refinement. Meanwhile the elongation had been increased due to HSMF treatment. The average elongation of TC4 alloy was 13.12% which was enhanced by 31.07% compared to that of the untreated sample which was 10.01%. And, the elongation increased with the increment of magnetic induction intensity B. The HSME treatment could also play a role in hardening alloys. When B=2 T the micro-hardness was 344.88 HV, which was increased by 8.09% compared to that without treatment. The micro-hardness was consistent with the change of the "point" of the dislocation density, which was characterized by dislocation strengthening.

Influence of Microstructure of TC4 Titanium Alloy on Ultrasonic Velocity and Attenuation

2011 ◽  
Vol 117-119 ◽  
pp. 1766-1769
Author(s):  
Yun Long Ai ◽  
Li Liu ◽  
Wen He ◽  
Bing Liang Liang ◽  
Ji Lin Xu
Keyword(s):  
Titanium Alloy ◽  
Longitudinal Wave ◽  
Solution Treatment ◽  
Water Quenching ◽  
Air Cooling ◽  
Attenuation Coefficients ◽  
Wave Velocities ◽  
Tc4 Titanium Alloy ◽  
Heat Treated ◽  
Tc4 Alloy

Primeval TC4 titanium alloy was subjected to solution treatment at 1150°C for 1h, followed by water quenching, oil quenching, air cooling and furnace cooling, respectively. The pulse-echo method was carried out to measure ultrasonic longitudinal wave velocities (ν) and attenuation coefficients (α) of these heat-treated samples. The relationship between microstructures of different cooling rates and ultrasonic parameters such as ultrasonic longitudinal wave velocities (ν) and attenuation coefficients (α) was investigated. The results show that the microstructures of heat-treated TC4 alloy were α phase and β boundaries, and the ultrasonic longitudinal velocities and attenuation coefficients of these heat-treated samples, in turn, increased with reducing the cooling rate from water quenching to furnace cooling.

Impact of Heat-Treated Microstructure on Milling Performance of Ti-6Al-4V Alloy

2011 ◽  
Vol 418-420 ◽  
pp. 1175-1179
Author(s):  
Li Jun Pang ◽  
Ming Tang
Keyword(s):  
Heat Treatment ◽  
Titanium Alloy ◽  
High Efficiency ◽  
Orthogonal Design ◽  
Regression Equations ◽  
Milling Force ◽  
Milling Parameters ◽  
Heat Treated ◽  
Alloy Material ◽  
Optimum Heat

The milling of titanium alloy has been widely used in aerospace field for the advantages of high-quality and high-efficiency. In order to provide the theoretical basis of practical production through optimizing the milling parameters of titanium alloy material and improving the milling property of Ti-6Al-4V, the orthogonal design approach is adopted to analyze the milling force experiment of three typical microstructure of Ti-6Al-4V titanium alloy, utilizing the algorithm of least squares establishes the multivariate linear regression equations of the milling parameters on the main milling force and conducts the regression analysis, obtained more accurate empirical formula of milling force of Ti-6Al-4V titanium alloy under different heat treatment process. Furthermore, the significances of the regression equation and regression coefficients are testing with using MATLAB statistical software. Consequently, the optimum heat treatment processing and the optimal milling parameters are obtained through analyzing the results above.

Modeling of the Temperature Distribution in Machining TC4 Titanium Alloy

2012 ◽  
Vol 182-183 ◽  
pp. 945-949
Author(s):  
Bin Li ◽  
Hong Wang
Keyword(s):  
Numerical Simulation ◽  
Titanium Alloy ◽  
Flow Behavior ◽  
Metal Flow ◽  
Cutting Process ◽  
Trial And Error ◽  
Tc4 Titanium Alloy ◽  
Tc4 Alloy ◽  
Beta Structure ◽  
Alpha Beta

As one of the most commonly used titanium alloys, TC4 (Ti6Al4V) has an alpha–beta structure and is widely used for aircraft components. In this study, numerical simulation was conducted by using FEM software on the whole cutting process for TC4 alloy mounting parts in an effort to investigate the metal flow behavior. This study not only helps to understand but also to improve and optimize cutting process, which are based on experience combined with a trial-and-error approach.

Structure and Properties of TC4 Alloy by Die Forming and Sintering Utilizing Hydrogenated Powder

2011 ◽  
Vol 291-294 ◽  
pp. 629-634
Author(s):  
Ya Qiang Tian ◽  
Hong Liang Hou ◽  
Xue Ping Ren
Keyword(s):  
Titanium Alloy ◽  
Hydrogen Content ◽  
Room Temperature ◽  
Sintering Temperature ◽  
Yield Limit ◽  
Structure And Properties ◽  
Duplex Structure ◽  
Tc4 Titanium Alloy ◽  
Tc4 Alloy ◽  
Die Forming

The influence of hydrogenation on structure and properties of TC4 alloy by die forming and sintering using hydrogenated powder was researched and the modification mechanism was analyzed by means of the room-temperature die forming and sintering in protection air to produce titanium alloy. The results show that, with the increase of hydrogen content and sintering temperature, the structure of TC4 titanium production using hydrogenated powder by die forming and sintering was changed from Widmanstaten structure to duplex structure. The density of TC4 titanium production shows a rise trend gradually. After annealing, the structure of TC4 titanium production gets more uniformity and refinement obviously, the compress yield limit shows a rising trend gradually, and the hydrogen content of TC4 alloy safety state is achieved. The density and mechanical property of TC4 titanium alloy with hydrogen content of 0.42wt % is the best.

An Experimental Study of Cutting Force on Large Cutting Depth Turning Titanium Alloy with CBN Tool

2014 ◽  
Vol 800-801 ◽  
pp. 237-240
Author(s):  
Li Fu Xu ◽  
Ze Liang Wang ◽  
Shu Tao Huang ◽  
Bao Lin Dai
Keyword(s):  
Experimental Study ◽  
Titanium Alloy ◽  
Cutting Force ◽  
Feed Rate ◽  
Cutting Speed ◽  
Cutting Parameters ◽  
Cutting Depth ◽  
Cbn Tool ◽  
Cutting Experiment ◽  
Rough Turning

In this paper, the cutting experiment was used to study the influence of various cutting parameters on cutting force when rough turning titanium alloy (TC4) with the whole CBN tool. The results indicate that among the cutting speed, feed rate and cutting depth, the influence of the cutting depth is the most significant on cutting force; the next is the feed rate and the cutting speed is at least.

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