Sage Journals: Discover world-class research

Abstract

In this work, (Fe, Cr)₇C₃-Fe/Hadfield steel composites were fabricated through in situ synthesis with infiltration casting and subsequent heat treatment. The microstructure, microhardness, impact toughness, and wear resistance of (Fe, Cr)₇C₃-Fe/Hadfield steel composites were studied through scanning electron microscopy, X-ray diffraction, microhardness testing, impact testing, and wear testing. The results show that austenite and (Fe, Cr)₇C₃ carbides are predominant phases in the reinforcing bar of the composites. The (Fe, Cr)₇C₃ particulates have an important role in improving the mechanical properties of the composite. The best wear resistance of the composites was 1.6 times higher than that of Hadfield steel under a 5-N load. The wear resistance mechanism was not only due to the higher hardness of the (Fe, Cr)₇C₃-Fe bundle but also to the excellent work hardening ability of the Hadfield steel matrix. The fracture mechanism was in the ductile-brittle fracture mode. The good fracture toughness of the (Fe, Cr)₇C₃-Fe/Hadfield steel composite is mainly due to the presence of microcracks in the interface and the high toughness of the Hadfield steel matrix.

Keywords

Composites in situ synthesis wear resistance impact toughness

Get full access to this article

View all access options for this article.

References

Kaczmar

Pietrzak

Włosiński

. The production and application of metal matrix composite materials. J Mater Process Technol 2000; 106: 58–67.

Ray

. Synthesis of cast metal matrix particulate composites. J Mater Sci 1993; 28: 5397–5413.

Hill

Weber

Huth

. The impact of processing on microstructure, single-phase properties and wear. Wear 2011; 271: 1895–1902.

. Preparation of nickel-coated titanium carbide particulates and their use in the production of reinforced iron matrix composites. Mater Des 2013; 52: 572–579.

Zhong

Hojamberdiev

. Fabrication and microstructure of in situ vanadium carbide ceramic particulates-reinforced iron matrix composites. Ceram Int 2013; 39: 731–736.

Flores

Neville

Kapur

. Assessing the resistance of metal matrix composites and their microstructural integrity under erosion–corrosion. Wear 2011; 271: 1331–1340.

Niu

Hojamberdiev

. Preparation of in situ-formed WC/Fe composite on gray cast iron substrate by a centrifugal casting process. J Mater Process Technol 2010; 210: 1986–1990.

Hassan

Lewandowski

. Laminated nanostructure composites with improved bend ductility and toughness. Scr Mater 2009; 61: 1072–1074.

Osman

Lewandowski

Lesuer

. The fracture resistance of layered DRA materials: Influence of laminae thickness. Mater Sci Eng A 1997; 229: 1–9.

10.

Niinomi

Kobayashi

. Fracture characteristics analysis related to the microstructures in titanium alloys. Mater Sci Eng A 1996; 213: 16–21.

11.

Soy

Ficici

Demir

. Evaluation of the Taguchi method for wear behavior of Al/SiC/B₄C composites. J Compos Mater 2012; 46: 851–859.

12.

Dharmalingam

Subramanian

Vinoth

. Analysis of dry sliding friction and wear behavior of aluminum-alumina composites using Taguchi’s techniques. J Compos Mater 2010; 44: 2161–2177.

13.

Pandey

Majumdar

Miracle

. Effect of aluminum particles on the fracture toughness of a 7093/SiC/15p composite. Mater Sci Eng A 1999; 259: 296–307.

Microstructure and mechanical properties of (Fe,Cr) 7 C 3 -Fe/Hadfield steel composites

Abstract

Keywords

Get full access to this article

References