Microstructural and mechanical characteristics of in situ metal matrix composites

In order to increase wear resistance cast steel casting the TiC-Fe-Cr type composite zones were fabricated. These zones were obtained by means of in situ synthesis of substrates of the reaction TiC with a moderator of a chemical composition of white cast iron with nickel of the Ni-Hard type 4. The synthesis was carried out directly in the mould cavity. The moderator was applied to control the reactive infiltration occurring during the TiC synthesis. The microstructure of composite zones was investigated by electron scanning microscopy, using the backscattered electron mode. The structure of composite zones was verified by the X-ray diffraction method. The hardness of composite zones, cast steel base alloy and the reference samples such as white chromium cast iron with 14 % Cr and 20 % Cr, manganese cast steel 18 % Mn was measured by Vickers test. The wear resistance of the composite zone and the reference samples examined by ballon-disc wear test. Dimensionally stable composite zones were obtained containing submicron sizes TiC particles uniformly distributed in the matrix. The macro and microstructure of the composite zone ensured three times hardness increase in comparison to the cast steel base alloy and one and a half times increase in comparison to the white chromium cast iron 20 % Cr. Finally ball-on-disc wear rate of the composite zone was five times lower than chromium white cast iron containing 20 % Cr.

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“…To the most popular ceramic phases used for castings reinforcements can be counted: TiC, WC, VC, TiN, Al 2 O 3 and ZrO 2 [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Hardness and Wear Resistance of TiC-Fe-Cr Locally Reinforcement Produced in Cast Steel

Olejnik

Szymański

Kurtyka

et al. 2016

Archives of Foundry Engineering

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“…A possible alternative is to synthesize the reinforcement in situ in the metal matrix. [23] Recent research work [17][18][19] has shown that in-situ aluminum matrix composites can be fabricated by FSP without a further consolidation process. The basic idea for fabricating the in-situ composites is to combine the hot-working nature of FSP and the exothermic reaction between aluminum and transition metals.…”

Section: Introductionmentioning

confidence: 99%

Effect of Processing Parameters on Microstructure and Mechanical Properties of an Al-Al11Ce3-Al2O3 In-Situ Composite Produced by Friction Stir Processing

Chen

Kao

Chang

et al. 2009

Metall Mater Trans A

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Friction stir processing (FSP) was applied to produce aluminum-based in-situ composites from powder mixtures of Al-5 mol pct CeO 2 . A billet of powder mixtures was prepared using the conventional pressing and sintering route. The sintered billet was then subjected to multiple passages of FSP. This technique has combined the hot-working nature of FSP and the exothermic reaction between Al and CeO 2 . The reinforcing phases were identified as Al 11 Ce 3 and d * -Al 2 O 3 . The Al 2 O 3 particles with an average size of~10 nm are uniformly distributed in the aluminum matrix, which has an average grain size of approximately 390 to 500 nm. Both the sintering temperature and the tool traversing speed used in FSP have significant influence on the microstructure and mechanical properties of the composite. The composite produced by sintering at 833 K followed by FSP with a tool traversing speed of 30 mm/min possesses an enhanced modulus (E = 109 GPa) and strength (ultimate tensile strength (UTS) = 488 MPa) as well as a tensile ductility of~3 pct.

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“…Up to date, they have been widely used as a light weight structural material and applied in automobile and aerospace [1][2][3][4][5]. It is known that the high temperature wear resistance of the in situ AMCs mainly determined by the kinds, sizes, shapes and thermodynamic stabilities of the reinforcements and their interfacial bonding strengths with the matrix at high temperature [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Dry Sliding Tribological Behavior at Elevated Temperature of In Situ Aluminum Matrix Composites Fabricated by Al-ZrO2-C System with Different Mole Ratio of C/ZrO2

Zhu¹,

Sun²,

Huang³

et al. 2017

J Powder Metall Min

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Microstructural and mechanical characteristics of in situ metal matrix composites

Cited by 1,574 publications

References 68 publications

Hardness and Wear Resistance of TiC-Fe-Cr Locally Reinforcement Produced in Cast Steel

Hardness and Wear Resistance of TiC-Fe-Cr Locally Reinforcement Produced in Cast Steel

Effect of Processing Parameters on Microstructure and Mechanical Properties of an Al-Al11Ce3-Al2O3 In-Situ Composite Produced by Friction Stir Processing

Dry Sliding Tribological Behavior at Elevated Temperature of In Situ Aluminum Matrix Composites Fabricated by Al-ZrO2-C System with Different Mole Ratio of C/ZrO2

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