Microstructure, wear, and compressive behaviour of laser cladded hybrid TiC-SiC reinforced 16MnCr5 composites

作     者：Kyekyere, Ernest Olakanmi, Eyitayo Olatunde Prasad, Raghupatruni Ventaka Satya Botes, Annelize Pityana, Sisa Lesley 

作者机构：Department of Mechanical Energy & Industrial Engineering Botswana International University of Science & Technology Palapye Botswana  Botswana International University of Science & Technology Palapye Botswana Research Group Botswana International University of Science & Technology Palapye Botswana Department of Chemical Materials and Metallurgical Engineering Botswana International University of Science & Technology Botswana Department of Mechanical Engineering Nelson Mandela University Port Elizabeth South Africa Laser-Enabled Manufacturing Research Group Council for Scientific & Industrial Research Pretoria South Africa 

出 版 物：《Surface and Coatings Technology》 (Surf. Coat. Technol.)

年 卷 期：2025年第498卷

核心收录：

学科分类：080602[工学-钢铁冶金] 080503[工学-材料加工工程] 0817[工学-化学工程与技术] 0806[工学-冶金工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0803[工学-光学工程] 

基　　金：This work was funded by the Botswana International University of Science and Technology (BIUST) (DVC/RDI/2/1/7V (S00466)) Education, Audiovisual and Culture Executive Agency (EACEA) of the European Commission (Agreement No. 2019\u20131973/5 \u2013 Project No. 614655) and the African Laser Centre (ALC) research collaboration grant (HLHA24X task ALC-R020).The authors acknowledge the technical and financial assistance from the Education for Laser-based Manufacturing Consortium (ELbM), the Council for Scientific and Industrial Research, South Africa, and Botswana International University of Science and Technology (BIUST), Botswana.This work was funded by the Botswana International University of Science and Technology (BIUST) ( DVC/RDI/2/1/7V (S00466) ) Education, Audiovisual and Culture Executive Agency (EACEA) of the European Commission (Agreement No. 2019\u20131973/5 \u2013 Project No. 614655 ) and the African Laser Centre (ALC) research collaboration grant ( HLHA24X task ALC-R020 ) 

主　　题：Iron alloys 

摘      要：Hybrid reinforcement composite coatings have enormous potential in improving the wear resistance and mechanical properties of components subjected to high-loading conditions. This study explored the synergic effect of TiC (20 wt% to 40 wt%) and SiC (0 to 20 wt%) contents on the geometry, phase evolution, microstructure, microhardness, wear, and compressive behaviour of 16MnCr5-TiC-SiC ternary composite coatings on A514 steel substrate. The dominant phases observed in the coatings are α-Fe, TiC, FexSiy, Fe3C, and M7C3. As the content of SiC increases, Fe3C and M7C3 phases gradually disappear due to the stabilisation of the Fe with Si. The microhardness of the coatings was substantially enhanced, with the average matrix microhardness varying between 778.6 ± 73 HV0.3 to 1003.3 ± 47 HV0.3, compared to the substrate (214.5 ± 9 HV0.3), which constitutes an increase of 263 % to 368 %. The wear resistance properties of all the coatings exhibited an improvement varying between 2.5 and 6.7 times over that of the substrate, with 5 wt% SiC/35 wt% TiC coating achieving the highest wear resistance. The high SiC content compromised the coatings microhardness and wear resistance due to its high dissociation and subsequent graphite precipitation in the Fe alloys. Furthermore, the compressive strength of the coating with 5 % SiC was the highest (1128.2 ± 21 MPa), surpassing that of the substrate (992.4 ± 67 MPa) by 14 %. In contrast, the lowest compressive strength (525.2 ± 58 MPa) occurred in the coating with 0 % SiC due to the high volume proportion of retained carbides in the matrix, which detach from the matrix under stress, leading to deformation. © 2025 Elsevier B.V.