NDLI: Effects of Si on the Microstructures and Mechanical Properties of High-Chromium Cast Iron

Content Provider	Springer Nature Link
Author	Lai, J. P. Pan, Q. L. Peng, H. J. Cui, H. R. Xiao, C. A.
Copyright Year	2016
Abstract	Effect of Si on the microstructures and mechanical properties of high-chromium cast iron was investigated. The eutectic carbides are refined greatly and a transformation of matrix from austenitic matrix to pearlite is observed with increase in Si content from 0.5 to 1.5 wt.%. The refinement of eutectic microstructure is attributed to the decrease in the eutectic temperature, while the transformation from austenite matrix to pearlite is associated with the increase in solubility of carbon in the matrix. In the pearlite matrix, two types of pearlite are observed: one with lamellar pearlite, distributing at the periphery, and the second one with granular pearlite at the center. The density of secondary carbides precipitated from the matrix increases greatly with addition of Si from 0.5 to 1.5 wt.%, which is associated with more carbon and chromium elements confined in the matrix in the alloy containing 1.5 wt.%. More rod-like particles are observed in the alloy containing 0.5 wt.% Si, while the morphology of secondary carbides of alloy containing 1.5 wt.% is granular. The mechanical properties are improved with a 7% increase in tensile strength from 586 to 626 MPa and impact toughness from 5.8 to 7.3 J cm$^{−2}$.
Starting Page	4617
Ending Page	4623
Page Count	7
File Format	PDF
ISSN	10599495
Journal	Journal of Materials Engineering and Performance
Volume Number	25
Issue Number	11
e-ISSN	15441024
Language	English
Publisher	Springer US
Publisher Date	2016-09-20
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	cast iron optical microscopy phase transformation x-ray Characterization and Evaluation of Materials Tribology, Corrosion and Coatings Quality Control, Reliability, Safety and Risk Engineering Design
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Materials Science Mechanical Engineering

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