Combined influence of cooling strategies and depth of cut on the deformation-induced martensitic transformation turning AISI 304

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  • Technische Universität Kaiserslautern
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OriginalspracheEnglisch
Aufsatznummer117861
FachzeitschriftJournal of Materials Processing Technology
Jahrgang312
Frühes Online-Datum2 Jan. 2023
PublikationsstatusVeröffentlicht - März 2023

Abstract

The subsurface of metastable austenitic steels can be transformed to martensite by cryogenic turning. To enhance the phase transformation and at the same time the productivity of the production process to save time and energy, it is advantageous to use high depths of cut. However, when in-process cooling methods are used, the effectively cooled zone is cut away in the cryogenic machining process for high depths of cut. As it is shown in the present study by pre-cooling the workpieces using liquid N2, the whole workpiece and following the subsurface layer is sufficiently cooled, and a high martensite content can be obtained at high depths of cut. Moreover, the use of a sub-zero metalworking fluid (MWF) also proved to be advantageous. The sub-zero MWF was applied within the cutting process. Due to the better heat transfer coefficient compared to other cryogenic in-process cooling methods like liquid N2 or CO2 snow, a high cooling capacity was achieved even though the lubricant had a higher working temperature. Additionally, the martensitic subsurface transformation was more homogeneous compared to other in-process cooling methods and the surface quality was enhanced. Further, eddy current testing is a suitable non-destructive testing method for possible process control as it allows for the detection of deformation-induced martensite. It showed, nevertheless, an additional in-process cooling to the pre-cooled workpieces is advantageous to ensure a homogeneous hardening effect over the workpiece length and cutting process time.

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Combined influence of cooling strategies and depth of cut on the deformation-induced martensitic transformation turning AISI 304. / Fricke, Lara Vivian; Basten, Stephan; Nguyen, Hai Nam et al.
in: Journal of Materials Processing Technology, Jahrgang 312, 117861, 03.2023.

Publikation: Beitrag in FachzeitschriftArtikelForschungPeer-Review

Fricke LV, Basten S, Nguyen HN, Breidenstein B, Kirsch B, Aurich JC et al. Combined influence of cooling strategies and depth of cut on the deformation-induced martensitic transformation turning AISI 304. Journal of Materials Processing Technology. 2023 Mär;312:117861. Epub 2023 Jan 2. doi: 10.1016/j.jmatprotec.2023.117861
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title = "Combined influence of cooling strategies and depth of cut on the deformation-induced martensitic transformation turning AISI 304",
abstract = "The subsurface of metastable austenitic steels can be transformed to martensite by cryogenic turning. To enhance the phase transformation and at the same time the productivity of the production process to save time and energy, it is advantageous to use high depths of cut. However, when in-process cooling methods are used, the effectively cooled zone is cut away in the cryogenic machining process for high depths of cut. As it is shown in the present study by pre-cooling the workpieces using liquid N2, the whole workpiece and following the subsurface layer is sufficiently cooled, and a high martensite content can be obtained at high depths of cut. Moreover, the use of a sub-zero metalworking fluid (MWF) also proved to be advantageous. The sub-zero MWF was applied within the cutting process. Due to the better heat transfer coefficient compared to other cryogenic in-process cooling methods like liquid N2 or CO2 snow, a high cooling capacity was achieved even though the lubricant had a higher working temperature. Additionally, the martensitic subsurface transformation was more homogeneous compared to other in-process cooling methods and the surface quality was enhanced. Further, eddy current testing is a suitable non-destructive testing method for possible process control as it allows for the detection of deformation-induced martensite. It showed, nevertheless, an additional in-process cooling to the pre-cooled workpieces is advantageous to ensure a homogeneous hardening effect over the workpiece length and cutting process time.",
keywords = "Cooling strategies, Cryogenic, Deformation-induced martensitic transformation, Eddy current testing, Machining",
author = "Fricke, {Lara Vivian} and Stephan Basten and Nguyen, {Hai Nam} and Bernd Breidenstein and Benjamin Kirsch and Aurich, {Jan C.} and David Zaremba and Maier, {Hans J{\"u}rgen} and Sebastian Barton",
note = "Funding Information: Financial support of this study by the German Research Foundation (DFG) within the research priority program SPP 2086 (grant project number 401800578 and 401538950 ) is gratefully acknowledged. ",
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T1 - Combined influence of cooling strategies and depth of cut on the deformation-induced martensitic transformation turning AISI 304

AU - Fricke, Lara Vivian

AU - Basten, Stephan

AU - Nguyen, Hai Nam

AU - Breidenstein, Bernd

AU - Kirsch, Benjamin

AU - Aurich, Jan C.

AU - Zaremba, David

AU - Maier, Hans Jürgen

AU - Barton, Sebastian

N1 - Funding Information: Financial support of this study by the German Research Foundation (DFG) within the research priority program SPP 2086 (grant project number 401800578 and 401538950 ) is gratefully acknowledged.

PY - 2023/3

Y1 - 2023/3

N2 - The subsurface of metastable austenitic steels can be transformed to martensite by cryogenic turning. To enhance the phase transformation and at the same time the productivity of the production process to save time and energy, it is advantageous to use high depths of cut. However, when in-process cooling methods are used, the effectively cooled zone is cut away in the cryogenic machining process for high depths of cut. As it is shown in the present study by pre-cooling the workpieces using liquid N2, the whole workpiece and following the subsurface layer is sufficiently cooled, and a high martensite content can be obtained at high depths of cut. Moreover, the use of a sub-zero metalworking fluid (MWF) also proved to be advantageous. The sub-zero MWF was applied within the cutting process. Due to the better heat transfer coefficient compared to other cryogenic in-process cooling methods like liquid N2 or CO2 snow, a high cooling capacity was achieved even though the lubricant had a higher working temperature. Additionally, the martensitic subsurface transformation was more homogeneous compared to other in-process cooling methods and the surface quality was enhanced. Further, eddy current testing is a suitable non-destructive testing method for possible process control as it allows for the detection of deformation-induced martensite. It showed, nevertheless, an additional in-process cooling to the pre-cooled workpieces is advantageous to ensure a homogeneous hardening effect over the workpiece length and cutting process time.

AB - The subsurface of metastable austenitic steels can be transformed to martensite by cryogenic turning. To enhance the phase transformation and at the same time the productivity of the production process to save time and energy, it is advantageous to use high depths of cut. However, when in-process cooling methods are used, the effectively cooled zone is cut away in the cryogenic machining process for high depths of cut. As it is shown in the present study by pre-cooling the workpieces using liquid N2, the whole workpiece and following the subsurface layer is sufficiently cooled, and a high martensite content can be obtained at high depths of cut. Moreover, the use of a sub-zero metalworking fluid (MWF) also proved to be advantageous. The sub-zero MWF was applied within the cutting process. Due to the better heat transfer coefficient compared to other cryogenic in-process cooling methods like liquid N2 or CO2 snow, a high cooling capacity was achieved even though the lubricant had a higher working temperature. Additionally, the martensitic subsurface transformation was more homogeneous compared to other in-process cooling methods and the surface quality was enhanced. Further, eddy current testing is a suitable non-destructive testing method for possible process control as it allows for the detection of deformation-induced martensite. It showed, nevertheless, an additional in-process cooling to the pre-cooled workpieces is advantageous to ensure a homogeneous hardening effect over the workpiece length and cutting process time.

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KW - Cryogenic

KW - Deformation-induced martensitic transformation

KW - Eddy current testing

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DO - 10.1016/j.jmatprotec.2023.117861

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JO - Journal of Materials Processing Technology

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SN - 0924-0136

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ER -

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