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In situ fabrication of TiC–TiB2 precipitates in Mn-steel using thermal explosion (TE) casting

Published online by Cambridge University Press:  16 April 2015

Yunhong Liang ,
Qian Zhao ,
Zhihui Zhang ,
Zhiwu Han ,
Xiujuan Li  and
Luquan Ren
Yunhong Liang
Affiliation:
The Key Laboratory of Bionic Engineering, Ministry of Education, Jilin University, Changchun 130025, China
Qian Zhao
Affiliation:
The Key Laboratory of Bionic Engineering, Ministry of Education, Jilin University, Changchun 130025, China
Zhihui Zhang*
Affiliation:
The Key Laboratory of Bionic Engineering, Ministry of Education, Jilin University, Changchun 130025, China
Zhiwu Han
Affiliation:
The Key Laboratory of Bionic Engineering, Ministry of Education, Jilin University, Changchun 130025, China
Xiujuan Li
Affiliation:
The Key Laboratory of Bionic Engineering, Ministry of Education, Jilin University, Changchun 130025, China
Luquan Ren
Affiliation:
The Key Laboratory of Bionic Engineering, Ministry of Education, Jilin University, Changchun 130025, China
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

The Mn-steel matrix composite locally reinforced with in situ TiC–TiB2 ceramic particulate was successfully fabricated using a thermal explosion-casting route in a Cu–Ti–B4C system with various B4C particle sizes. With the increase of B4C particle size, the ignition temperature increased, the combustion temperature decreased, and the size of the TiC and TiB2 ceramic particulates became smaller. The hardness, friction coefficient, and wear resistance of the composite were higher than those of the Mn-steel matrix. With the increase of B4C particle size, the size of the TiC and TiB2 ceramic particulates fabricated in the local reinforcing region decreased, the interface bonding between reinforcing region and matrix became poor, and the number of pores in the local reinforcing region increased. Moreover, the composite with ∼3.5 μm B4C showed the best antiwear property. At a low load of 20 N, the dominant wear mechanisms of the Mn-steel matrix composite were microcutting and abrasive wear. While, at a high load of 80 N, the dominant wear mechanisms were microcutting and adhesion wear associated with the formation of delamination layer.

Keywords

Mn-steel matrix compositethermal explosion (TE)ceramicwear
Type
Articles
Information
Journal of Materials Research , Volume 30 , Issue 7 , 14 April 2015 , pp. 1019 - 1028
Copyright
Copyright © Materials Research Society 2015 

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