An investigation of cutting forces and cutting temperatures during laser-assisted machining of the Ti–6Cr–5Mo–5V–4Al beta titanium alloy

Rashid, Rizwan Abdul Rahman; Sun, Shoujin; Wang, Gui; Dargusch, Matthew S.

doi:10.1016/j.ijmachtools.2012.06.004

Cited by 131 publications

(53 citation statements)

References 29 publications

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“…It is interesting that during LAM the relationship also remains linear as the cutting forces depend upon the MRR. On average 12 % forces can be reduced during LAM of titanium beta alloys [98]. Among others, laser power is the majorly influencing parameter for heating, cutting forces and MRR.…”

Section: Cutting Forces and Materials Removal Ratementioning

confidence: 99%

Laser Beam Machining, Laser Beam Hybrid Machining, and Micro-channels Applications and Fabrication Techniques

Darwish

Ahmed

Al‐Ahmari

2016

Machining, Joining and Modifications of Advanced Materials

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Laser beam machining (LBM) has proven its applications and advantages over almost all the range of engineering materials. It offers its competences from macro machining to micro and nano-machining of simple-to-complex shapes. The flipside of LBM is the existence of universal problems associated with its thermal ablation mechanism. In order to alleviate or reduce the inherent problems of LBM, a massive research has been done during the past decade and in turn build a relatively new route of laser-hybrid processes. The hybrid approaches in laser ablation have demonstrated much improved results in terms of material removal rate, surface integrity, geometrical tolerances, thermal damage, metallurgical alterations and many more. This chapter reviews the research work carried out so far in the area of LBM and its hybrid processes for different materials and shapes.

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Section: Cutting Forces and Materials Removal Ratementioning

confidence: 99%

Laser Beam Machining, Laser Beam Hybrid Machining, and Micro-channels Applications and Fabrication Techniques

Darwish

Ahmed

Al‐Ahmari

2016

Machining, Joining and Modifications of Advanced Materials

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“…The machining parameters were chosen based on the laser assisted machining and conventional machining experiments previously conducted by the authors' research group [308]. The machining parameters are listed in Table 1.…”

Section: Geometry and Meshmentioning

confidence: 99%

“…The previously mentioned analytical method developed by Yang et al [318] was adopted in this work to calculate the absorptivity of the workpiece material. The method is expressed as Equation 3, and the data used for the absorptivity calculation comes from the experimental work conducted by the authors' group [307,308].…”

Section: Laser Heating Thermal Modelmentioning

confidence: 99%

“…The details of laser assisted machining of Ti-6Cr-5Mo-5V-4Al alloy experiments have been reported by the authors' research group [308]. Both the thermal model and the machining model Table 1.…”

Section: Experimental Validationmentioning

confidence: 99%

“…Dandekar et al [306] reported a significant machinability improvement for the Ti-6Al-4V alloy during laser assisted machining, with reduced specific cutting energy and improved surface roughness compared to conventional machining. Rahman Rashid et al [307,308] conducted experimental studies on laser assisted machining of the beta titanium alloy Ti6Cr-5Mo-5V-4Al. It was found through this work that cutting force can be reduced by up to 15%…”

Section: Introductionmentioning

confidence: 99%

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The dynamic response of β titanium alloys to high strain rates at room and elevated temperatures

Zhan¹

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Titanium and its alloys fulfil a wide range of applications involving aerospace, biomedical, chemical and petroleum industries due to their extraordinary properties such as high specific strength, excellent biocompatibility and corrosion resistance. Among different types of titanium alloys, β titanium alloys have a unique range of properties such as an excellent combination of high strength and fracture toughness and low Young's modulus. Therefore, the usage of β titanium alloys in the manufacturing of some key components in aerospace and biomedical industries has continually increased in the past decade.Nowadays many commercial manufacturing processes for metallic materials such as machining, explosive welding, hot forging and extrusion employ high strain rates and are conducted at elevated temperatures. Also, high-strain-rate deformation can be encountered in collisions such as in car crashes, bird strikes on airplanes and micrometeorite impacts on space structures. Hence a large number of studies have been conducted on the dynamic response of metallic materials including copper, steels, tantalum, Ti-6Al-4V alloy and commercially pure titanium to high strain rates. Due to limited knowledge of the dynamic behaviour of β titanium alloys, this thesis mainly investigates the stress-strain behaviour and microstructural evolution of β titanium alloys under high strain rates at room and elevated temperatures.Split Hopkinson Pressure Bar compressive tests were carried out on two new types of β titanium alloys with different levels of β phase stability, the Ti-6Cr-5Mo-5V-4Al (wt. %) and Ti-25Nb-3Zr-3Mo-2Sn (wt.%) alloys, at strain rates ranging from 10 -3 s -1 to 10 4 s -1 and temperatures ranging from 293K to 1173K. The Ti-6Cr-5Mo-5V-4Al alloy, with relatively high β phase stability, represents an alloy type which can be engineered through heat treatment or thermo-mechanical processing to achieve a superior combination of strength and fracture toughness. While the Ti-25Nb-3Zr-3Mo-2Sn alloy with relatively low β phase stability represents an alloy type which can be applied in biomedical applications due to their low Young's modulus and superelastic properties.For the Ti-6Cr-5Mo-5V-4Al alloy, dislocation slip is dominant at all testing strain rates and temperatures in this research. The flow stress increases with increasing strain rate but decreasing temperature. Also, it is more sensitive to temperature than strain rate. At ambient temperatures, the strain hardening rate exhibited by the Ti-6Cr-5Mo-5V-4Al alloy at high strain rates is much lower than that at quasi-static strain rates, which is attributed to the thermal softening effect brought byHongyi Zhan II The University of Queensland adiabatic heating. While for the Ti-25Nb-3Zr-3Mo-2Sn alloy, multiple deformation mechanisms including dislocation slip, {332} <113> and {112} <111> mechanical twinning, stress-induced martensitic α" and ω phase transformations can be activated simultaneously and among them {332} <113> twinning is dominant at 293K regardless of...

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Overview of Hybrid Micromachining and Microfabrication Techniques

Kunar

Singh

Raviteja

et al. 2023

Hybrid Micromachining and Microfabrication Technologies

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An investigation of cutting forces and cutting temperatures during laser-assisted machining of the Ti–6Cr–5Mo–5V–4Al beta titanium alloy

Cited by 131 publications

References 29 publications

Laser Beam Machining, Laser Beam Hybrid Machining, and Micro-channels Applications and Fabrication Techniques

Laser Beam Machining, Laser Beam Hybrid Machining, and Micro-channels Applications and Fabrication Techniques

The dynamic response of β titanium alloys to high strain rates at room and elevated temperatures

Overview of Hybrid Micromachining and Microfabrication Techniques

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