The effects of machined workpiece surface integrity on the fatigue life of γ-titanium aluminide

Sharman, A.R.C.; Aspinwall, D.K.; Dewes, R.C.; Clifton, David A.; Bowen, P.

doi:10.1016/s0890-6955(01)00034-7

Cited by 94 publications

(55 citation statements)

References 7 publications

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“…2) has three eccentric clamping cams 4 toward to its axis. Each one may turn toward to cylindrical slides that are evenly located on a circle and are spring-loaded to enable free release (opening of work hole for a shank of a cylindrical tool) with a ring spring 5 having bent edges and that is installed in a cylindrical groove of the chuck body [12].…”

Section: A Study Of Efficiency Eccentric Drilling-milling Chuck Hasanmentioning

confidence: 99%

A Study of Efficiency Eccentric Drilling-Milling Chuck

Dabbas¹

2015

IJMMM

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Abstract-The articles describe the design and results of study of specifications of a drill and milling chuck.The results of the study eccentric chuck rounds with the key in static and during cutting. A feature of the chuck used in manual, pneumatic and electric drills drilling, CNC milling, multi-purpose, woodworking and other machines , the existence of two kinematics chains, it possible to obtain high gain and reinforce the rigidity of the cutting tool with a cylindrical shank. This demonstrates the effectiveness of their use in the Machine-assembling manufacture.Eccentric drilling and milling chuck designed for fast and secure clamping tools with cylindrical shank (drills, countersinks, reamers, milling cutters, etc.) right and left but self-rotation within specified range and other multi-purpose machines. Chuck design is to provides fast replacement tool, accuracy, durability, and reliable clamping of the hand or a key on a principle of self-locking chucks efficiently and conveniently used in surgical operations -for opening holes in the bones, that require low weight and dimensions as well as the reliability of fixation drill or other tool with quick changeover to another clamp diameter.

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Section: A Study Of Efficiency Eccentric Drilling-milling Chuck Hasanmentioning

confidence: 99%

A Study of Efficiency Eccentric Drilling-Milling Chuck

Dabbas¹

2015

IJMMM

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“…These characteristics are critical in determining the fatigue life of machined components [1][2][3]. For example, Guo and Schwach [4] reported the hardness of the subsurface layer affects the fatigue life of AISI 52100 steel after machining.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…A combination of the body-centered tetragonal Ni 3 Nb, γ'', precipitates and the face-centered cubic Ni 3 (Al, Ti), γ' precipitates distributed in the γ matrix enables it to operate at a high temperatures. δ phase particles are the result of γ'' transformation to more stable state of Ni 3 Nb over long time exposure at temperatures above 650°C. In addition, the microstructure contains (Nb, Ti)C carbides with orthorhombic structure, localized at grain boundaries, which inhibit grain growth at high temperatures thereby improving creep properties [9,10].…”

Section: Introductionmentioning

confidence: 99%

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Accurate determination of damaged subsurface layers in machined Inconel 718

Touazine

Jahazi

Bocher

2016

Int J Adv Manuf Technol

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The machining of high strength materials used in aeronautical applications generates damage on the subsurface layer which can significantly affect the fatigue life of the machined components. It is then important to distinguish between the damages due to machining from those caused by mechanical polishing operations used for sample observation. In this study, a new method is proposed to characterize and quantify properly the affected layer by machining and eliminate the impact from the defects originated during mechanical polishing. A protective layer of nickel coating was deposited on the machined surface. An optimum thickness of 100 µm was determined for the nickel layer to avoid any damage to the subsurface layer during sample preparation. The subsurface layer was analyzed using an automatic Knoop microhardness machine, laser-digital microscope and Electron BackScatter Diffraction (EBSD) microscopy.

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“…Further, it is found that they are extremely difficult to machine by conventional methods due to their excellent strength property. Different aspects of machining of this alloy have been investigated by several researchers [11][12][13]. But no comprehensive research work has been reported so far, and thus, no technology tables or charts are available in the field of wire electrical discharge machining of this alloy.…”

Section: Introductionmentioning

confidence: 99%

Parametric optimisation of wire electrical discharge machining of γ titanium aluminide alloy through an artificial neural network model

Sarkar

Mitra

Bhattacharyya

2005

Int J Adv Manuf Technol

113

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In the present research, wire electrical discharge machining (WEDM) of γ titanium aluminide is studied. Selection of optimum machining parameter combinations for obtaining higher cutting efficiency and accuracy is a challenging task in WEDM due to the presence of a large number of process variables and complicated stochastic process mechanisms. In general, no perfect combination exists that can simultaneously result in both the best cutting speed and the best surface finish quality. This paper presents an attempt to develop an appropriate machining strategy for a maximum process criteria yield. A feedforward back-propagation neural network is developed to model the machining process. The three most important parameterscutting speed, surface roughness and wire offset -have been considered as measures of the process performance. The model is capable of predicting the response parameters as a function of six different control parameters, i.e. pulse on time, pulse off time, peak current, wire tension, dielectric flow rate and servo reference voltage. Experimental results demonstrate that the machining model is suitable and the optimisation strategy satisfies practical requirements.

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The effects of machined workpiece surface integrity on the fatigue life of γ-titanium aluminide

Cited by 94 publications

References 7 publications

A Study of Efficiency Eccentric Drilling-Milling Chuck

A Study of Efficiency Eccentric Drilling-Milling Chuck

Accurate determination of damaged subsurface layers in machined Inconel 718

Parametric optimisation of wire electrical discharge machining of γ titanium aluminide alloy through an artificial neural network model

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