Workpiece surface integrity considerations when finish turning gamma titanium aluminide

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

doi:10.1016/s0043-1648(01)00575-0

Cited by 103 publications

(89 citation statements)

References 20 publications

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“…It is important, therefore, to understand the effect of changing parameters on different aspects of surface integrity. This is a well-researched area, and much work has been done to encompass a great variety of approaches and techniques to determine the state of the material after manufacture [4,5,7,8,12]. In general, it involves investigating the surface roughness, metallurgical changes, micro-hardness, and the residual stresses of the machined work piece [13].…”

Section: Machining Challengesmentioning

confidence: 99%

“…The toughness and chemical reactivity of titanium at high temperatures are further sources of damage to the material surface [6]. The production of heat-affected zones, plastic deformation, redeposited material, and cavities are typical indicating factors [7]. These defects propagate to form micro-cracks that, under load, can progress to core or critical sections causing sudden failure [8].…”

Section: Introductionmentioning

confidence: 99%

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The Effect of Cutting Parameters on Surface Integrity in Milling Ti6al4v

Oosthuizen

Nunco

Conradie

et al. 2016

SAJIE

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The objective of machining performance is to reduce operational costs and to increase the production rate while maintaining or improving the required surface integrity of the machined component. Together with industrial partners, several benchmark titanium components were selected and machined to achieve this. Titanium alloys are used extensively in several industries due to its unique strength-to-weight ratio and corrosion resistance. Its properties, however, also make it susceptible to surface integrity damage during machining operations. The research objectives of this study were to understand the effect of cutting parameters on surface integrity to ensure that machined components are within the required surface quality tolerances. The effect of cutting speed and feed rate on surface roughness, micro-hardness, and the microstructure of the work piece were studied for milling Ti6Al4V. The surface roughness increased with a greater feed rate and a decrease in cutting speed. The maximum micro-hardness was 23 per cent harder than the bulk material. Plastic deformation and grain rotation below the machined surface were found with the rotation of the grain lines in the direction of feed. There was no evidence of subsurface defects for any of the cutting conditions tested. OPSOMMINGDie masjineringsvermoë doelwit bly steeds om operasionele kostes te verminder en om die produksietempo te verhoog, terwyl die vereiste oppervlakafwerking van die komponent gehandhaaf of verbeter word. Ten einde hierdie doelstelling te bereik is verskeie komponente in samewerking met industrievennote, as maatstaaf komponente gekies en gemasjineer. Titaan allooie word op groot skaal in verskeie industrieë gebruik vanweë sy unieke sterkte-totdigtheid verhouding en korrosiebestandheid. Hierdie eienskappe maak die allooi egter ook vatbaar vir oppervlakafwerking skade tydens die masjineringsproses. Die navorsingsdoelstelling van hierdie studie was om die effek van die snyparameters op die oppervlakafwerking te verstaan, om sodoende te verseker dat die komponente binne die vereiste oppervlak toleransies vervaardig word. Die effek van snyspoed en voertempo tydens freeswerk op die oppervlak grofheid, mikrohardheid en mikrostruktuur van die Ti6Al4V werkstuk is bestudeer. Die oppervlakgrofheid het verhoog met 'n toename in voertempo en vermindering in snyspoed. Die maksimum mikrohardheid was 23 persent harder as die basismateriaal. Plastiese vervorming en korrel rotasie onder die gemasjineerde werkstuk oppervlak is gevind met die korrelgrein in die rigting van die voer. Daar was geen aanduiding van suboppervlak defekte onder enige van die toets kondisies nie.

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Section: Machining Challengesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Effect of Cutting Parameters on Surface Integrity in Milling Ti6al4v

Oosthuizen

Nunco

Conradie

et al. 2016

SAJIE

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“…The processing characteristics sharply deteriorate at high mechanical strength at high temperatures as well as low thermal conductivity of Ti / Ni-based alloys [1][2][3][4][5]. Cutting off parts from nickel-base heat-resistant alloys (for example, Inconel 718, Udimed 720) leads to both a rapid wear of the cutting tool and tool surface [1,[11][12][13][14][15][16], which can be generally called surface anomalies. These surface anomalies are the result of the bad processing characteristics of nickel-base alloys and the trend of rapid tool wear at cutting regardless of the types of machining operations [11,12,[14][15][16][17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

A model of milling process based on Morlet wavelets decomposition of vibroacoustic signals

Khaymovich¹,

Prokhorov²,

Stolbova³

et al. 2017

Collection of Selected Papers of the III International Conference on Information Technology and Nanotechnology

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The paper considers the problem of online monitoring the condition of cutting tools to avoid its unexpected failure. To approach this problem we proposed a model of milling process based on Morlet decomposition of vibroacoustic signals. In addition, using the wavelets scalogram, we imposed a new condition that helps to improve early wear detection of the cutting tool. The findings of this research reveal the advantages of the proposed model compared to the previously reported models that rely on Haar wavelets and Short-time Fourier transform.

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“…Ultrasonically-assisted machining was shown to have beneficial effects on the average cutting force with significant reductions in excess of 50% [10] and reaching up to 80% in particular conditions [11,12]. Cutting force effects were most pronounced when vibrations were imposed on the tool in the same direction of cut [4].…”

Section: Introductionmentioning

confidence: 99%

Experimental investigations on effects of frequency in ultrasonically-assisted end-milling of AISI 316L: A feasibility study

Maurotto

Wickramarachchi

2016

Ultrasonics

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Article available under the terms of the CC-BY-NC-ND licence (https://creativecommons.org/licenses/by-nc-nd/4.0/) eprints@whiterose.ac.uk https://eprints.whiterose.ac.uk/ Reuse Unless indicated otherwise, fulltext items are protected by copyright with all rights reserved. The copyright exception in section 29 of the Copyright, Designs and Patents Act 1988 allows the making of a single copy solely for the purpose of non-commercial research or private study within the limits of fair dealing. The publisher or other rights-holder may allow further reproduction and re-use of this version -refer to the White Rose Research Online record for this item. Where records identify the publisher as the copyright holder, users can verify any specific terms of use on the publisher's website. TakedownIf you consider content in White Rose Research Online to be in breach of UK law, please notify us by emailing eprints@whiterose.ac.uk including the URL of the record and the reason for the withdrawal request.Experimental investigations on effects of frequency in ultrasonically-assisted end-milling of AISI 316L: a feasibility study.A. Abstract:The effects of frequency in ultrasonic vibration assisted milling (UVAM) with axial vibration of the cutter is investigated in this paper. A series of face-mill experiment in dry conditions were conducted on AISI 316L, an alloy of widespread use in industry. The finished surfaces roughness were studied along with basic considerations on tool wear for both conventional milling and an array of frequencies for UVAM in a wide range of cutting conditions. Surface residual stresses and cross-cut metallographic slides were used to investigate the hidden effects of UVAM.Experimental results showed competitive results for both surface roughness and residual stress in UVAM when compared with conventional milling especially in the low range of frequency with similar trend for tool wear.

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Workpiece surface integrity considerations when finish turning gamma titanium aluminide

Cited by 103 publications

References 20 publications

The Effect of Cutting Parameters on Surface Integrity in Milling Ti6al4v

The Effect of Cutting Parameters on Surface Integrity in Milling Ti6al4v

A model of milling process based on Morlet wavelets decomposition of vibroacoustic signals

Experimental investigations on effects of frequency in ultrasonically-assisted end-milling of AISI 316L: A feasibility study

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