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Vosough, Manouchehr
Publications (6 of 6) Show all publications
Vosough, M., Liu, P. & Svenningsson, I. (2006). Influence of high-pressure jet cooling on surface integrity of titanium alloy during turning (ed.). In: (Ed.), Proceedings of the International Conference on Advances in Mechanical Engineering: . Paper presented at International Conference on Advances in Mechanical Engineering : 01/12/2006 - 03/12/2006 (pp. 281-287).
Open this publication in new window or tab >>Influence of high-pressure jet cooling on surface integrity of titanium alloy during turning
2006 (English)In: Proceedings of the International Conference on Advances in Mechanical Engineering, 2006, p. 281-287Conference paper, Published paper (Refereed)
National Category
Manufacturing, Surface and Joining Technology
Research subject
Manufacturing Systems Engineering
Identifiers
urn:nbn:se:ltu:diva-29469 (URN)2f6f1280-f759-11db-ac79-000ea68e967b (Local ID)2f6f1280-f759-11db-ac79-000ea68e967b (Archive number)2f6f1280-f759-11db-ac79-000ea68e967b (OAI)
Conference
International Conference on Advances in Mechanical Engineering : 01/12/2006 - 03/12/2006
Note

Godkänd; 2006; 20070430 (ysko)

Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2018-02-26Bibliographically approved
Vosough, M., Liu, P. & Svenningsson, I. (2005). Depth profile of titanium alloy (Ti-6Al-4V) and residual stress measured by using X-ray diffraction after metal cutting assisted by high-pressured jet cooling evaluation of etching methods (ed.). In: (Ed.), (Ed.), Residual Stresses VII: ICRS 7: Proceedings of the 7th International Conference on Residual Stresses. Paper presented at International Conference on Residual Stresses : 14/07/2004 - 17/07/2004 (pp. 545-551). Uetikon-Zürich: Trans Tech Publications Inc.
Open this publication in new window or tab >>Depth profile of titanium alloy (Ti-6Al-4V) and residual stress measured by using X-ray diffraction after metal cutting assisted by high-pressured jet cooling evaluation of etching methods
2005 (English)In: Residual Stresses VII: ICRS 7: Proceedings of the 7th International Conference on Residual Stresses, Uetikon-Zürich: Trans Tech Publications Inc., 2005, p. 545-551Conference paper, Published paper (Refereed)
Abstract [en]

Titanium alloys are used in aerospace industry owing to their high strength to weight ratio. These alloys are considered to be difficult to machine due to their rigidity and poor thermal conductivity. High-pressure jet-assisted machining of titanium alloys is beneficial. It not only increases production efficiency, by increasing the cutting speed and lowering temperature both in cutting zone and the cutting tool, but also improves chip control, and increases tool life. It also produces better surface integrity and compress residual stress, which improves the properties of work metals such as fatigue. In order to compare the effect of high-pressure jet-assisted machining on the work pieces of Ti-6Al-4V alloy, the depth profile of residual stress was measured using xray diffraction. As comparison, the depth profile of residual stress was also measured for the conventional machined work pieces. It was found that the residual stress was a function of machining parameters, such as cutting speed, feeding force and depth of cut and particularly the high-pressure jet increases the amount of residual compressional stresses in both cutting and feed direction. In the present paper, Ti6A14V rod was machined by turning in two different manners, finishing and roughing. Tests were conducted on a lathe using different cooling systems, high pressure and conventional. To illustrate the effect of high-pressure jet assisted machining on the properties of the work piece of Ti-6-Al-4V and the depth profile of its residual stress, X -ray defractometer was used. The maximal amplitude of residual stress, at both the longitude (feeding direction) and transversal (cutting) directions, the depth of compress residual stress and the depth of the total residual stress will be present as the function of the machining parameters.

Place, publisher, year, edition, pages
Uetikon-Zürich: Trans Tech Publications Inc., 2005
Series
Materials Science Forum, ISSN 0255-5476 ; 490-491
National Category
Manufacturing, Surface and Joining Technology
Research subject
Manufacturing Systems Engineering
Identifiers
urn:nbn:se:ltu:diva-34349 (URN)10.4028/www.scientific.net/MSF.490-491.545 (DOI)35148827621 (Scopus ID)886708b0-6203-11dc-ac97-000ea68e967b (Local ID)878499695 (ISBN)886708b0-6203-11dc-ac97-000ea68e967b (Archive number)886708b0-6203-11dc-ac97-000ea68e967b (OAI)
Conference
International Conference on Residual Stresses : 14/07/2004 - 17/07/2004
Note
Validerad; 2005; 20070913 (ysko)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2017-11-25Bibliographically approved
Vosough, M. (2005). Effect of high-pressure cooling on the residual stress in Ti-alloys during machining (ed.). (Licentiate dissertation). Paper presented at . Luleå: Luleå tekniska universitet
Open this publication in new window or tab >>Effect of high-pressure cooling on the residual stress in Ti-alloys during machining
2005 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

Titanium alloys are widely used in aerospace industry but also in other industry sectors. Details for compressors used for generation and petrochemical plants and medical devices can be mentioned as a few examples. Plastic deformation during forming of the metals introduces residual stresses. Fatigue, creep and corrosion are typical failure mechanisms that are stopped or accelerated in the presence of tensile residual stress. Metal cutting as a manufacturing method generates residual stresses in the surface layer. The stress state in the near-surface zone of components is of special interest as the surface often suffers loads and consequently the cracks initiate and begin to grow at that location. The scope of this thesis is to investigate the properties of the machined surface with regards to measurement of residual stresses. The results achieved by X-ray diffractometry were compared with the results using a simulating method with the same cutting data for checking the accuracy of these two methods. This review highlighted the residual stress character and how they can be measured by X-ray diffractometry in two different directions, the transversal, the cutting direction, and longitudinal, the feed direction. For measurement of residual stress under the surface, the material was removed by an electro-chemical polishing method for not introducing more stress. The same procedure was checked using Finite Element simulations. The results obtained from the investigation clarified that: The residual stress measurement by X-rays was quite accurate in comparison with finite element simulation on the surface generated by turning on titanium alloy. There were compressive residual stresses in the cutting and feed directions of the cut. Residual stress is beneficial for delay of crack propagation. High-pressure cooling produced and increased compressional residual stresses.

Place, publisher, year, edition, pages
Luleå: Luleå tekniska universitet, 2005. p. 42
Series
Licentiate thesis / Luleå University of Technology, ISSN 1402-1757 ; 2005:46
National Category
Manufacturing, Surface and Joining Technology
Research subject
Manufacturing Systems Engineering
Identifiers
urn:nbn:se:ltu:diva-17957 (URN)609e4340-8f4d-11db-8975-000ea68e967b (Local ID)609e4340-8f4d-11db-8975-000ea68e967b (Archive number)609e4340-8f4d-11db-8975-000ea68e967b (OAI)
Note
Godkänd; 2005; 20061218 (haneit)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved
Vosough, M. & Svenningsson, I. (2005). Influence of high pressure water-jet-assisted machining on surface residual stresses on the work-piece of Ti-6AL-4V alloy (ed.). In: (Ed.), (Ed.), Third International Conference on Experimental Mechanics and Third Conference of the Asian Committee on Experimental Mechanics: . Paper presented at International Conference on Experimental Mechanics, Smart Structures and Non-Destructive Testing : 29/11/2004 - 01/12/2004 (pp. 127-133). Bellingham, Wash: SPIE - International Society for Optical Engineering
Open this publication in new window or tab >>Influence of high pressure water-jet-assisted machining on surface residual stresses on the work-piece of Ti-6AL-4V alloy
2005 (English)In: Third International Conference on Experimental Mechanics and Third Conference of the Asian Committee on Experimental Mechanics, Bellingham, Wash: SPIE - International Society for Optical Engineering, 2005, p. 127-133Conference paper, Published paper (Refereed)
Abstract [en]

Titanium alloys are used in aerospace industry owing to their high strength to weight ratio. These alloys are considered to be difficult to machine due to their rigidity and poor thermal conductivity. High-pressure jet-assisted machining of titanium alloys is beneficial. It not only increases production efficiency, by increasing the cutting speed and lowering temperature both in cutting zone and the cutting tool, but also improves chip control and increases tool life. It also produces better surface integrity and compress residual stress, which improves the properties of work-piece. Ti-6Al-4V (Ti-64) rod was machined by turning in two different manners, finishing and roughing. Tests were conducted on a lathe using the same cutting data and different cooling systems, high pressure and conventional. In order to illustrate the effect of high-pressure jet-assisted machining on the properties of the work-piece of Ti-6Al-4V and its residual stress, x-ray defractometery was used. The present study revealed that there were compressive residual stresses in the transversal and longitudinal directions of the cut and the residual stresses in both directions were nearly of the same magnitude. The depth profile of residual stress was measured as well after removing the material by etching. The shear stress was very low, almost negligible. High pressure cooling affected residual stresses in finishing more than in roughing

Place, publisher, year, edition, pages
Bellingham, Wash: SPIE - International Society for Optical Engineering, 2005
Series
Proceedings of SPIE, the International Society for Optical Engineering, ISSN 0277-786X ; 5852
National Category
Manufacturing, Surface and Joining Technology
Research subject
Manufacturing Systems Engineering
Identifiers
urn:nbn:se:ltu:diva-34179 (URN)10.1117/12.621449 (DOI)000229932000020 ()2-s2.0-28444492017 (Scopus ID)84d7ad60-eeb5-11db-bb5c-000ea68e967b (Local ID)9780819458520 (ISBN)84d7ad60-eeb5-11db-bb5c-000ea68e967b (Archive number)84d7ad60-eeb5-11db-bb5c-000ea68e967b (OAI)
Conference
International Conference on Experimental Mechanics, Smart Structures and Non-Destructive Testing : 29/11/2004 - 01/12/2004
Note
Validerad; 2005; 20070419 (ysko)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2018-07-10Bibliographically approved
Vosough, M., Kalhori, V., Liu, P. & Svenningsson, I. (2004). Influence of high pressure water-jet assisted turning on surface residual stresses on Ti-6AL-4V alloy by measurement and finite element simulation (ed.). In: (Ed.), (Ed.), Surface Engineering - Proceedings of the 3rd International Surface Engineering Conference: . Paper presented at International Surface Engineering Conference : 02/08/2004 - 04/08/2004 (pp. 107-113).
Open this publication in new window or tab >>Influence of high pressure water-jet assisted turning on surface residual stresses on Ti-6AL-4V alloy by measurement and finite element simulation
2004 (English)In: Surface Engineering - Proceedings of the 3rd International Surface Engineering Conference, 2004, p. 107-113Conference paper, Published paper (Refereed)
Abstract [en]

Residual stresses from the machining process can cause severe failure due to fatigue and stress corrosion. The depth profile of residual stress was measured for high-pressure water-jet assisted machining of Ti-6Al-4V alloy using x-ray diffraction. As comparison, the depth profile of residual stress was also measured for the conventional machined work-piece. The finite element simulation, using the updated Lagrangian formulation was also used to study the dynamic transient process. It was found that the residual stress was a function of machining parameters, such as cutting speed, feed force, depth of cut and particularly the high-pressure jet increases the amount of residual compression stresses in both cutting and feed directions. It is shown that the high-pressure water-jet assisted machining of titanium alloys is beneficial. It reduces shear forces in the secondary cutting zone along the tool/chip interface, reduces the cutting force and introduces compressive residual stress in the finished work-piece.

National Category
Manufacturing, Surface and Joining Technology Other Mechanical Engineering
Research subject
Manufacturing Systems Engineering; Computer Aided Design
Identifiers
urn:nbn:se:ltu:diva-28103 (URN)1c3eeed0-f3dd-11db-ac9f-000ea68e967b (Local ID)1c3eeed0-f3dd-11db-ac9f-000ea68e967b (Archive number)1c3eeed0-f3dd-11db-ac9f-000ea68e967b (OAI)
Conference
International Surface Engineering Conference : 02/08/2004 - 04/08/2004
Note
Godkänd; 2004; 20070426 (cira)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2017-11-25Bibliographically approved
Vosough, M. (2001). A literature study of high pressure cooling "jet break" and metal cutting in titanium (ed.). Paper presented at . Luleå: Luleå tekniska universitet
Open this publication in new window or tab >>A literature study of high pressure cooling "jet break" and metal cutting in titanium
2001 (English)Report (Other academic)
Abstract [en]

The purpose of this literature review is to study the basics of metal cutting and investigate how a high-pressure water jet can facilitate the cutting process. The aim of this literature study is to give a summary of books , papers and reports which were searched by the key words to build up the basic for research planning to investigate the effects on the cutting zone and surface properties when applying "Jet Break" in turning of titanium and stainless steels for the aerospace industry, in comparison when using conventional coolant.

Place, publisher, year, edition, pages
Luleå: Luleå tekniska universitet, 2001
Series
Technical report / Luleå University of Technology, ISSN 1402-1536 ; 2001:19
National Category
Manufacturing, Surface and Joining Technology
Research subject
Manufacturing Systems Engineering
Identifiers
urn:nbn:se:ltu:diva-22014 (URN)1242f1d0-2a8f-11dd-8657-000ea68e967b (Local ID)1242f1d0-2a8f-11dd-8657-000ea68e967b (Archive number)1242f1d0-2a8f-11dd-8657-000ea68e967b (OAI)
Note
Godkänd; 2001; 20080525 (ysko)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved

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