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Heinrichs, Jannica
Publications (10 of 58) Show all publications
Heinrichs, J., Norgren, S., Jacobson, S. & Olsson, M. (2019). Cemented carbide wear initiation in sliding contact with iron ore. In: Proceedings of 2nd Sweden-China Symposium on Tribology: . Paper presented at 2nd Sweden-China Symposium on Tribology.
Open this publication in new window or tab >>Cemented carbide wear initiation in sliding contact with iron ore
2019 (English)In: Proceedings of 2nd Sweden-China Symposium on Tribology, 2019Conference paper, Oral presentation with published abstract (Other academic)
National Category
Engineering and Technology
Identifiers
urn:nbn:se:uu:diva-392921 (URN)
Conference
2nd Sweden-China Symposium on Tribology
Available from: 2019-09-11 Created: 2019-09-11 Last updated: 2019-09-11
Heinrichs, J., Norgren, S., Jacobson, S. & Olsson, M. (2019). Influence of cemented carbide binder type on wear initiation in rock drilling – investigated in sliding wear against magnetite rock. In: Proceedings of International Conference on the Science of Hard Materials, Khao Lak, Thailand: . Paper presented at International Conference on the Science of Hard Materials, March 25-29, 2019, Khao Lak, Thailand.
Open this publication in new window or tab >>Influence of cemented carbide binder type on wear initiation in rock drilling – investigated in sliding wear against magnetite rock
2019 (English)In: Proceedings of International Conference on the Science of Hard Materials, Khao Lak, Thailand, 2019Conference paper, Oral presentation with published abstract (Other academic)
National Category
Engineering and Technology
Identifiers
urn:nbn:se:uu:diva-392918 (URN)
Conference
International Conference on the Science of Hard Materials, March 25-29, 2019, Khao Lak, Thailand
Available from: 2019-09-11 Created: 2019-09-11 Last updated: 2019-09-11
Heinrichs, J., Norgren, S., Jacobson, S., Yvell, K. & Olsson, M. (2019). Influence of cemented carbide binder type on wear initiation in rock drilling – investigated in sliding wear against magnetite rock. International journal of refractory metals & hard materials, 85
Open this publication in new window or tab >>Influence of cemented carbide binder type on wear initiation in rock drilling – investigated in sliding wear against magnetite rock
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2019 (English)In: International journal of refractory metals & hard materials, ISSN 0958-0611, E-ISSN 2213-3917, Vol. 85Article in journal (Refereed) Published
National Category
Engineering and Technology
Identifiers
urn:nbn:se:uu:diva-392913 (URN)
Available from: 2019-09-11 Created: 2019-09-11 Last updated: 2019-09-11
Olander, P. & Heinrichs, J. (2019). Initiation and propagation of tool wear in turning of titanium alloys - Evaluated in successive sliding wear test. Paper presented at 22nd International Conference on Wear of Materials (WOM), APR 14-18, 2019, Miami, FL. Wear, 426-427(Part B), 1658-1666
Open this publication in new window or tab >>Initiation and propagation of tool wear in turning of titanium alloys - Evaluated in successive sliding wear test
2019 (English)In: Wear, ISSN 0043-1648, E-ISSN 1873-2577, Vol. 426-427, no Part B, p. 1658-1666Article in journal (Refereed) Published
Abstract [en]

Titanium alloys are known to cause significant crater wear on the rake face of cutting inserts when exposed to the fresh chip during cuffing, limiting the lifetime of the tool. Previous studies have shown that wear surfaces on inserts has a crater filled with transferred titanium. The WC grains in the bottom of the crater are depleted of carbon, resulting in a top surface rich in tungsten. To further investigate the initiation of wear in the present study a sliding test, previously developed to imitate the conditions on the rake face during cuffing, was used. The test was performed in interrupted mode, allowing intermediate SEM studies of the tool surface, while successively increasing the sliding distance. A cemented carbide grade, H13A, commonly used for cutting titanium alloys, and titanium alloy Ti6Al4V were used as model materials. The results from the sliding tests showed that both transfer of titanium and wear of the cemented carbide composite occur simultaneously. The wear is shallow and occurs on a very small scale, which adds up to a large crater, which is continuously filled with a smooth layer of titanium.

Place, publisher, year, edition, pages
ELSEVIER SCIENCE SA, 2019
Keywords
Sliding test, Titanium alloy, Ti6Al4V, Cemented carbide, Wear mechanism
National Category
Tribology (Interacting Surfaces including Friction, Lubrication and Wear)
Identifiers
urn:nbn:se:uu:diva-382824 (URN)10.1016/j.wear.2019.01.077 (DOI)000464585200077 ()
Conference
22nd International Conference on Wear of Materials (WOM), APR 14-18, 2019, Miami, FL
Available from: 2019-05-06 Created: 2019-05-06 Last updated: 2019-05-06Bibliographically approved
Olander, P. & Heinrichs, J. (2019). Initiation and propagation of tool wear in turning of titanium alloys – evaluated in successive sliding wear test. In: Proceedings of Wear of Materials Conference, Miami, Florida, USA: . Paper presented at Wear of Materials Conference, April 14-18, 2019, Miami, Florida, USA.
Open this publication in new window or tab >>Initiation and propagation of tool wear in turning of titanium alloys – evaluated in successive sliding wear test
2019 (English)In: Proceedings of Wear of Materials Conference, Miami, Florida, USA, 2019Conference paper, Oral presentation with published abstract (Other academic)
National Category
Engineering and Technology
Identifiers
urn:nbn:se:uu:diva-392923 (URN)
Conference
Wear of Materials Conference, April 14-18, 2019, Miami, Florida, USA
Available from: 2019-09-11 Created: 2019-09-11 Last updated: 2019-09-11
Hiroko, M., Heinrichs, J., Wiklund, U., Kawamura, S. & Jacobson, S. (2019). Initiation wear of cemented carbide tools used in copper processing - evaluated in sliding contact. In: Proceedings of International Conference on the Science of Hard Materials, Khao Lak, Thailand: . Paper presented at International Conference on the Science of Hard Materials, March 25-29, 2019, Khao Lak, Thailand.
Open this publication in new window or tab >>Initiation wear of cemented carbide tools used in copper processing - evaluated in sliding contact
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2019 (English)In: Proceedings of International Conference on the Science of Hard Materials, Khao Lak, Thailand, 2019Conference paper, Oral presentation with published abstract (Other academic)
National Category
Engineering and Technology
Identifiers
urn:nbn:se:uu:diva-392919 (URN)
Conference
International Conference on the Science of Hard Materials, March 25-29, 2019, Khao Lak, Thailand
Available from: 2019-09-11 Created: 2019-09-11 Last updated: 2019-09-11
Heinrichs, J., Mikado, H., Kawakami, A., Wiklund, U., Kawamura, S. & Jacobson, S. (2019). Wear mechanisms of WC-Co cemented carbide tools and PVD coated tools used for shearing Cu-alloy wire in zipper production. Wear, 420, 96-107
Open this publication in new window or tab >>Wear mechanisms of WC-Co cemented carbide tools and PVD coated tools used for shearing Cu-alloy wire in zipper production
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2019 (English)In: Wear, ISSN 0043-1648, E-ISSN 1873-2577, Vol. 420, p. 96-107Article in journal (Refereed) Published
Abstract [en]

To form the individual elements, that together form a zipper, a pre-formed Cu-alloy wire is sheared using cemented carbide tools. The wear caused by the relatively soft copper alloy on the much harder tool is generally quite slow. However, millions of elements are to be sheared so eventually the wear becomes unacceptable and the tool needs to be exchanged. To improve product quality, as well as minimize down time and material consumption, the tool life needs to be prolonged. To achieve this the wear process needs to be better understood. Uncoated tools used for an increasing number of shearing events have been studied in detail using high resolution SEM and EDS, to map the propagating wear and get an insight into the wear mechanisms. Transfer of material from the Cu-alloy to the tool occurs and the wear is highly concentrated to specific areas. This wear occurs on a very fine scale, limited to within individual WC grains at each event. Tools coated with PVD CrC and PVD CrN have been studied for comparison with the uncoated cemented carbide. Both coatings successfully protect the cemented carbide tool from wear, however occasional flaking occurs and then the cemented carbide becomes exposed and subsequently worn. The differences in performance and wear mechanisms between the uncoated and coated tools are discussed, with focus on the capability of the coatings to prolong the tool life.

Keywords
Cemented carbide, Cutting, Shearing, Wear, Cu-alloy
National Category
Manufacturing, Surface and Joining Technology
Identifiers
urn:nbn:se:uu:diva-375796 (URN)10.1016/j.wear.2018.12.075 (DOI)000456176100009 ()
Available from: 2019-02-15 Created: 2019-02-15 Last updated: 2019-02-15Bibliographically approved
Roizard, X., Heinrichs, J., Buteri, A., Jacobson, S., Borgeot, M., Carpentiar, L., . . . Lallemand, F. (2018). Friction behavior of ferritic stainless steel in a strongly diluted alcohol solution of alkylphosphonic acid. Paper presented at 17th Nordic Symposium on Tribology (NORDTRIB), JUN 14-17, 2016, Hameenlinna, FINLAND. Tribology International, 118, 465-473
Open this publication in new window or tab >>Friction behavior of ferritic stainless steel in a strongly diluted alcohol solution of alkylphosphonic acid
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2018 (English)In: Tribology International, ISSN 0301-679X, E-ISSN 1879-2464, Vol. 118, p. 465-473Article in journal (Refereed) Published
Abstract [en]

The present study investigates the potential for using this more environmentally friendly lubrication at an industrial scale forming of stainless steel. Against this background we analyze the characteristics of the tribofilm formed on a stainless steel surface during sliding experiments performed in solutions containing alkylphosphonic acids, under various contact conditions. Specific tribological tests were designed to analyze the dynamics of the lubricating mechanism. It was found that both the grafting of molecules and the transformation of these into an efficient tribofihn are quick processes, irrespective of substrate roughness or contact pressure, systematically leading to low friction coefficient.

Keywords
Stainless steel, Forming, Low friction, Phosphonic acids
National Category
Materials Engineering
Identifiers
urn:nbn:se:uu:diva-343657 (URN)10.1016/j.triboint.2017.04.027 (DOI)000423004700047 ()
Conference
17th Nordic Symposium on Tribology (NORDTRIB), JUN 14-17, 2016, Hameenlinna, FINLAND
Available from: 2018-05-09 Created: 2018-05-09 Last updated: 2018-05-09Bibliographically approved
Heinrichs, J., Olsson, M., Almqvist, B. & Jacobson, S. (2018). Initial surface failure and wear of cemented carbides in sliding contact with different rock types. Wear, 408-409, 43-55
Open this publication in new window or tab >>Initial surface failure and wear of cemented carbides in sliding contact with different rock types
2018 (English)In: Wear, ISSN 0043-1648, E-ISSN 1873-2577, Vol. 408-409, p. 43-55Article in journal (Refereed) Published
Abstract [en]

The initial wear, deformation and degradation of cemented carbide in contact with different rock types are studied using a crossed cylinder sliding test. The sliding distance is limited to centimetres at a time, interrupted by successive SEM analysis. This allows for careful studies of the gradually changing microstructure of the cemented carbide during the test. Five different rock types are included; granite, metal sulphide ore, mica schist, quartzite and marble. All rock types are very different in microstructure, composition and properties. The cemented carbide grade used for the evaluation contains 6 wt% Co and fine (~ 1 µm) WC grains, a grade commonly used in rock drilling. The results show that the cemented carbide microstructure becomes altered already during the very first contact with rock. The initial wear rate and wear character is highly influenced by the rock type. The initial wear of the cemented carbide is highest against quartzite and lowest against marble.

National Category
Tribology (Interacting Surfaces including Friction, Lubrication and Wear)
Identifiers
urn:nbn:se:uu:diva-351006 (URN)10.1016/j.wear.2018.04.017 (DOI)000436482000005 ()
Funder
Knowledge Foundation, 20150193
Available from: 2018-05-17 Created: 2018-05-17 Last updated: 2018-09-12Bibliographically approved
Heinrichs, J., Olsson, M., Yvell, K. & Jacobson, S. (2018). On the deformation mechanisms of cemented carbide in rock drilling: Fundamental studies involving sliding contact against a rock crystal tip. International journal of refractory metals & hard materials, 77, 141-151
Open this publication in new window or tab >>On the deformation mechanisms of cemented carbide in rock drilling: Fundamental studies involving sliding contact against a rock crystal tip
2018 (English)In: International journal of refractory metals & hard materials, ISSN 0958-0611, E-ISSN 2213-3917, Vol. 77, p. 141-151Article in journal (Refereed) Published
Abstract [en]

Cemented carbide is a composite material, most commonly consisting of tungsten carbide grains in a metallic matrix of cobalt. The combination of a hard ceramic phase in a ductile metallic matrix combines high hardness and ability to withstand plastic deformation with toughness to avoid cracking and fracturing. Since these properties are very important in rock drilling, cemented carbides are frequently used in such applications. In earlier work, it was found that granite in sliding contact with considerably harder cemented carbides not only results in plastic deformation of the cemented carbide composite, but also in plastic deformation of some of the individual WC grains. The latter observation is remarkable, since even the two hardest granite constituents (quartz and feldspar) are significantly softer than the WC grains. This tendency to plastic deformation of the WC grains was found to increase with increasing WC grain size. The present investigation aims to increase the understanding of plastic deformation of cemented carbides in general, and the individual WC grains in particular, in a situation representative for the rock drilling application. The emphasis is put on explaining the seemingly paradoxical fact that a nominally softer counter material is able to plastically deform a harder constituent in a composite material. The experimental work is based on a scratch test set-up, where a rock crystal tip slides against a fine polished cemented carbide surface under well-controlled contact conditions. The deformation and wear mechanisms of the cemented carbide are evaluated on the sub micrometer scale; using high resolution FEG-SEM, EDS, EBSD, BIB and FIB cross-sectioning. The size of the Co-pockets, together with the shape and size of WC grains, turned out to be decisive factors in determining the degree of carbide deformation. The results are discussed with respect to their industrial importance, including rock drilling.

National Category
Metallurgy and Metallic Materials
Identifiers
urn:nbn:se:uu:diva-363321 (URN)10.1016/j.ijrmhm.2018.04.022 (DOI)000445989200018 ()
Funder
Knowledge Foundation
Available from: 2018-10-16 Created: 2018-10-16 Last updated: 2018-11-28Bibliographically approved
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