Characterization of microstructure and tensile fracture behavior in a novel infiltrated TiC–steel composite. (February 2016)

• Record Type: Journal Article
• Authors: Oh, N.R.; Lee, S.K.; Hwang, K.C.; Hong, H.U.
• Is Part Of: Scripta materialia. Volume 112(2016)
• Page Start: 123
• Page End: 127
• Publication Date: 2016-02
• Subjects: Infiltration -- Transmission electron microscopy (TEM) -- Metal matrix composites (MMC) -- Dislocation -- Interfaces; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2015.09.028
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: The tool steel matrix composite was successfully produced by a novel infiltration method so as to have TiC reinforcement particles more than 57 vol.%. The interface between α-Fe and TiC was found to be semi-coherent nature and the orientation relationship was clearly confirmed, i.e. [012]α-Fe // [110]TiC, (200)α-Fe // 2 ¯ 24 TiC . Tensile fractures consisted mainly of {100} microcleavage of TiC grains with no interfacial decohesion. The increased strength of the composite at 700 °C is rationalized in terms of mutually interactive influences of load transfer mechanism and the matrix strengthening resulted from the increased density of dislocations. Graphical abstract: