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Understanding the diffusion wear mechanisms of WC-10%Co carbide tools during dry machining of titanium alloys

Ramirez, Christophe and Idhil Ismail, Andi and Gendarme, Christine and Dehmas, Moukrane and Aeby-Gautier, Elisabeth and Poulachon, Gérard and Rossi, Frédéric Understanding the diffusion wear mechanisms of WC-10%Co carbide tools during dry machining of titanium alloys. (2017) Wear, 390-391. 61-70. ISSN 0043-1648

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Official URL: http://dx.doi.org/10.1016/j.wear.2017.07.003

Abstract

The diffusion wear between a WC-10%Co tool and a Ti54M titanium alloy was investigated by studying the reaction between both the materials using a diffusion couple and studying their behavior during a machining test. In addition to the scanning electron microscopy (SEM) study, electron probe microanalysis (EPMA) was conducted to quantitatively analyze the chemical composition in the reactive layers after different holding times at 1100 °C. The diffusion couple revealed a rapid formation of TiC carbides at the interface. The layer growth is parabolic and is mainly toward the Ti54M side. The formation of three affected zones was observed. On the tool side, the two affected zones displayed a continuous decrease in the WC content, as well as a significant enrichment in the Co amount with no WC in the Co rich zone and a decrease in the W and C contents. On the Ti54M side, the tool elements diffused into the alloy material, with the diffusion lengths of C and Co being much longer than that of W. The solubilities of C and Co remained low while that of W was almost 8–9 wt%. The WC dissolution and compositional modification caused a degradation in the mechanical integrity of the tool surface, leading to crater damage. The machining experiments validated this mechanism and tool elements could be found in the adhered titanium layer

Item Type:Article
Additional Information:Thanks to Elsevier editor. The original PDF of the article can be found at Wear website : https://www.sciencedirect.com/science/article/pii/S0043164817303083?via%3Dihub
HAL Id:hal-01699146
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Other partners > Arts et Métiers ParisTech (FRANCE)
French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > Université de Lorraine (FRANCE)
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Deposited By: cirimat webmestre
Deposited On:02 Feb 2018 08:52

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