scholarly journals Machined Surface Topography Investigation in Turning of Titanium Alloy (Ti-6al-4v) Using Steam as A Coolant

2015 ◽  
Vol 12 (2) ◽  
pp. 104-107
Author(s):  
Afaqahmed Jamadar ◽  
Vilas Shinde ◽  
Muhammedumar Jamadar ◽  
Javed Kazi
Keyword(s):  
Titanium Alloy ◽  
Surface Topography ◽  
Machined Surface

THE CHARACTERISTICS OF FUNCTIONAL PROPERTIES OF THE MACHINED SURFACE BASED ON THE TOPOGRAPHY NON-PARAMETRIC AND PARAMETRIC DESCRIPTIONS

Tribologia ◽  
2019 ◽  
Vol 288 (6) ◽  
pp. 65-71
Author(s):  
Magdalena Niemczewska-Wójcik ◽  
Grzegorz Gawłowski
Keyword(s):  
Titanium Alloy ◽  
Surface Topography ◽  
Functional Properties ◽  
Material Properties ◽  
Interference Microscope ◽  
Machined Surface ◽  
Machine Material ◽  
Measuring Devices ◽  
Parametric Description ◽  
Scanning Electron

The shaping of the functional properties of the surface of an object in a technological process plays a key role in the later operation of this object. The paper presents the results of the tests performed on the surface topography of objects made of a selected hard-to-machine material, i.e., titanium alloy. Two measuring devices were used in the research, an interference microscope, and a scanning electron microscope, which enabled the comprehensive (nonparametric and parametric) description of surface topography obtained for three different finishing parameters. It was noted that, in addition to material properties, in the evaluation of the functional properties of a surface, it is important to carry out not only the qualitative, but also quantitative analysis of the machined surface topography.

scholarly journals Influence of turning tool wear on the surface integrity and anti-fatigue behavior of Ti1023

2021 ◽  
Vol 13 (4) ◽  
pp. 168781402110112
Author(s):  
Li Xun ◽  
Wang Ziming ◽  
Yang Shenliang ◽  
Guo Zhiyuan ◽  
Zhou Yongxin ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Plastic Deformation ◽  
Titanium Alloy ◽  
Fatigue Life ◽  
Tool Wear ◽  
Surface Integrity ◽  
Low Cycle Fatigue ◽  
Fatigue Behavior ◽  
Machined Surface ◽  
Deformation Layer

Titanium alloy Ti1023 is a typical difficult-to-cut material. Tool wear is easy to occur in machining Ti1023, which has a significant negative effect on surface integrity. Turning is one of the common methods to machine Ti1023 parts and machined surface integrity has a direct influence on the fatigue life of parts. To control surface integrity and improve anti-fatigue behavior of Ti1023 parts, it has an important significance to study the influence of tool wear on the surface integrity and fatigue life of Ti1023 in turning. Therefore, the effect of tool wear on the surface roughness, microhardness, residual stress, and plastic deformation layer of Ti1023 workpieces by turning and low-cycle fatigue tests were studied. Meanwhile, the influence mechanism of surface integrity on anti-fatigue behavior also was analyzed. The experimental results show that the change of surface roughness caused by worn tools has the most influence on anti-fatigue behavior when the tool wear VB is from 0.05 to 0.25 mm. On the other hand, the plastic deformation layer on the machined surface could properly improve the anti-fatigue behavior of specimens that were proved in the experiments. However, the higher surface roughness and significant surface defects on surface machined utilizing the worn tool with VB = 0.30 mm, which leads the anti-fatigue behavior of specimens to decrease sharply. Therefore, to ensure the anti-fatigue behavior of parts, the value of turning tool wear VB must be rigorously controlled under 0.30 mm during finishing machining of titanium alloy Ti1023.

scholarly journals Dynamic Generation of Machined Surfaces, Part 2: Construction of Surface Topography

1991 ◽  
Vol 113 (2) ◽  
pp. 145-153 ◽  
Author(s):  
G. M. Zhang ◽  
S. G. Kapoor
Keyword(s):  
Surface Topography ◽  
Random Excitation ◽  
Surface Generation ◽  
Distribution Model ◽  
Excitation System ◽  
Machined Surface ◽  
Spiral Trajectory ◽  
Vibratory Motion ◽  
Texture Generation ◽  
Simulation Results

In Part 1 of these two-part papers, a normal distribution model has been formulated to describe the random excitation system present during machining. Part 2 presents a methodology to dynamically generate the surface topography under the random excitation environment through computer simulation. The proposed methodology uses the tool vibratory motion along with the tool geometrical motion to construct the topography of a machined surface. Both experimental and simulation results confirm that when a small feed is used, the influence of the spiral trajectory of tool geometrical motion on the surface generation decays dramatically and the random excitation system, on the opposite, is strengthened playing a significant role in surface texture generation.

scholarly journals Flow Field Simulation And Experimental Investigation On Macro Electrolyte Jet Electrochemical Turning of TB6 Titanium Alloy

2021 ◽  
Author(s):  
Yang Liu ◽  
Ningsong Qu ◽  
Zhi Qiu
Keyword(s):  
Titanium Alloy ◽  
Flow Field ◽  
Contour Error ◽  
Tool Electrode ◽  
Machined Surface ◽  
Tb6 Titanium Alloy ◽  
Machined Surface Roughness ◽  
Application Potential ◽  
Electrochemical Turning ◽  
Electrolyte Jet

Abstract Electrolyte jet electrochemical turning is an effective method to realize high-quality machining of titanium alloy rotating components; however, minimal research has been carried out in this field. This is because it is difficult to control the machining flow field, which leads to poor machining surface quality. In this work, numerical simulations were used to optimize the machining flow field and reduce the proportion of gas that mixed into the machining area. This can promote participation of the tool electrode tip in the electrochemical reaction and improve the machining efficiency. The effectiveness of the optimized machining flow field for jet electrochemical turning was verified experimentally. The results showed that all three kinds of revolving TB6 titanium alloy samples with different structures could maintain the original contour shape, with a contour error <1% and a machined surface roughness reaching Ra 2.414 μm. The results demonstrate the application potential of the jet electrochemical turning process.

Control of Machining Process for Titanium Alloy Based on Green Cooling and Lubricating Technology

2012 ◽  
Vol 580 ◽  
pp. 7-11
Author(s):  
Yue Zhang ◽  
Li Han ◽  
You Jun Zhang ◽  
Xi Chuan Zhang
Keyword(s):  
Titanium Alloy ◽  
Water Vapor ◽  
High Speed ◽  
Cutting Temperature ◽  
Small Diameter ◽  
Machining Process ◽  
Machined Surface ◽  
Cutting Zone ◽  
Cutting Experiments ◽  
Special Control

The machining process of titanium alloys always need special control by using coolant and lubricant as it is one of the difficult-to-cut materials. The cutting experiments are carried out based on green cooling and lubricating technology. To achieve green cutting of titanium alloy Ti-6Al-4V with water vapor cooling and lubricating, a minitype generator is developed. Compared to dry and wet cutting, the using of water vapor decreases the cutting force and the cutting temperature respectively; enhances the machined surface. And it can help to chip forming and breaking. Water vapor application also improves Ti-6Al-4V machinability. The excellent cooling and lubricating action of water vapor could be summarized that water molecule has polarity, small diameter and high speed, can be easily and rapidly to proceed adsorption in the cutting zone. The results indicate that the using of water vapor has the potential to attain the green cutting of titanium alloy.

Effects of the micro-nano surface topography of titanium alloy on the biological responses of osteoblast

2016 ◽  
Vol 105 (3) ◽  
pp. 757-769 ◽  
Author(s):  
Chengcheng Yin ◽  
Yanjing Zhang ◽  
Qing Cai ◽  
Baosheng Li ◽  
Hua Yang ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Surface Topography ◽  
Biological Responses
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