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Flexural Strength and Toughness of Austenitic Stainless Steel Reinforced High-Cr White Cast Iron Composite
Faculty
Not Specified
Year:
2013
Type of Publication:
Article
Pages:
3769-3777
Authors:
Sallam, H. E. M, Abd El-Aziz, Kh, Abd El-Raouf, H, Elbanna, E. M
DOI:
10.1007/s11665-013-0666-0
Journal:
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE SPRINGER
Volume:
22
Research Area:
Materials Science
ISSN
ISI:000328207300023
Keywords :
flexural strength, flexural toughness, high-Cr white cast iron, metal matrix composites
Abstract:
Flexural behavior of high-Cr white cast iron (WCI) reinforced with different shapes, i.e., I-and T-sections, and volume fractions of austenitic stainless steel (310 SS) were examined under three-point bending test. The dimensions of casted beams used for bending test were (50 x 100 x 500 mm(3)). Carbon and alloying elements diffusion enhanced the metallurgical bond across the interface of casted beams. Carbon diffusion from high-Cr WCI into 310 SS resulted in the formation of Cr-carbides in 310 SS near the interface and Ni diffusion from 310 SS into high-Cr WCI led to the formation of austenite within a network of M7C3 eutectic carbides in high-Cr WCI near the interface. Inserting 310 SS plates into high-Cr WCI beams resulted in a significant improvement in their toughness. All specimens of this metal matrix composite failed in a ductile mode with higher plastic deformation prior to failure. The high-Cr WCI specimen reinforced with I-section of 310 SS revealed higher toughness compared to that with T-section at the same volume fraction. The presence of the upper flange increased the reinforcement efficiency for delaying the crack growth.
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