Effect of alloying elements and processing factors on the microstructure and hardness of sintered and induction-hardened Fe–C–Cu alloys

Wang, Wen-Fung

doi:10.1016/j.msea.2005.04.016

Cited by 24 publications

(9 citation statements)

References 14 publications

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“…It was noted that the micro hardness increased according to sintering temperature. The surface of the samples on which the micro hardness values were measured was related to the density due to compacting for P/M samples, powder lubrication condition and mechanical properties of the powder [32,[42][43][44][45][46]. It can be concluded that the micro harness was directly related to density and inversely related to porosity.…”

Section: Tab Imentioning

confidence: 99%

Effect of porosity, density and temperature on microstructure and mechanical behavior of hybrid premix sponge ferrous compact

2017

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This study on hybrid premix sponge ferrous sintered materials is focused on its mechanical properties and microstructure with respect to the amount of porosity. The pressure of 430 MPa and sintering temperatures 1090?C, 1115?C, and 1130?C in a Nitrogen atmosphere for an hour is followed to produce this hybrid premix sponge ferrous compact. Radial crush strength, dimensional change and micro hardness test were performed on these samples to determine the mechanical properties. Scanning electron microscope (SEM) was used for fractured surface analysis, while light optical microscopy (LOM) is used to study the structure and pore formation. The study infers, as porosity percentage increased, tendency of irregular pore formation increased with simultaneous decrease in mechanical properties of the sample. Temperature of sintering has a vital role in decreasing the porosity of powder materials.

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Section: Tab Imentioning

confidence: 99%

Effect of porosity, density and temperature on microstructure and mechanical behavior of hybrid premix sponge ferrous compact

2017

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“…Some small fraction of ferrite was observed at low amount of carbon. Nucleation and growth of the ferrite will be suppressed if more copper atoms as an austenite stabilizer dissolved in the austenite grains [25]. At subsequent stages, the as-sintered specimens (AS-A6 and AS-A9) are further cooled below the eutectoid temperature and residual austenite regions subsequently transform into pearlite [21].…”

Section: Microstructure Investigationmentioning

confidence: 99%

Microstructural association between mechanical behavior with bending fracture surfaces in Astaloy CrA sintered parts alloyed by Cu and C

2014

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a b s t r a c tApplication of powder metallurgy technique, a method presenting both economic and technical concepts for producing sintered parts, has been expanding in automobile and other engineering industries. Powder metallurgy parts usually possess residual porosity in their microstructures deteriorating mechanical performance. There have been many solutions to increasing of strength in these parts such as applying different heat treatment or adding alloying elements. It is well known that Fe-Cu-C is the one of main alloying system for both increasing the strength and decreasing cost of them. In this study, the microstructure, mechanical properties (transverse rapture strength and hardness), crack behavior and fracture modes of a low alloy Fe-Cr powder (Astaloy CrA) with different amount of copper (0, 1 and 2 wt.%) and carbon, in form of graphite (0.45, 0.6 and 0.8 wt.%) sintered at conventional condition have been investigated. Microstructural evolution showed adding copper and graphite as alloying elements could generate widespread of strength (857-1380 MPa) and hardness . Developing different phases in microstructure was the main reason for various mechanical properties. Crack coalescence phenomenon leads to fracturing with ductile (at sinter-necks) and brittle morphology. Micro-mechanism of fracture related to transparticle and interparticle crack propagation.

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“…21 Fu et al 22 suggested in their study that by adding Al to the matrix, the friction and wear properties of Fe-Cu-C matrix composites can be improved based on matrix reinforcement with the multi-alloy method. Except for the metallic alloy elements, Wang 23 studied the effect of Cu and P content along with some manufacturing parameters. This study showed that dimensional stability is related to P content, and P has an important influence on as-sintered alloys.…”

Section: Introductionmentioning

confidence: 99%

The influence of alloying elements on tribological properties of Fe-Cu-C based metal matrix composite bearing materials produced by powder metallurgy

Yavuz

Eyri

Yamanoğlu

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part J:

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Bearing materials are used in many industrial applications such as automotive, marine, aviation and hydroelectric power plants. Powder metallurgy is preferred because it is economically more advantageous in the production of this type of material. The main requirement in bearing materials is high tribological properties at a low cost. Therefore, the lower coefficient of friction and wear rate in the bearing materials are among the desired properties. In this regard, the tribological properties and other mechanical, physical, and microstructural properties of the produced samples were investigated in this study. Copper and graphite powder with 5 wt.% Mo, Ni, Al, Cr, and W was added to the base alloy of iron. After the production, density measurements, microstructural characterizations, hardness measurements, and dry friction wear tests were carried out on the samples. Analyzing the results, it was found that the highest density value was achieved in the base alloy. Furthermore, a density of over 90% was achieved in all samples. On the other hand, predominantly ferrite and pearlite phases were observed in the microstructure. When the hardness results were examined, it was determined that the Cr added alloys had maximum hardness. In the evaluation of tribological properties, it was shown that Ni alloy had the lowest friction coefficient and Al alloy had the highest friction coefficient. Considering the wear rates, it was seen that the alloy with the lowest wear rate was Cr and the highest wear rate was the alloy with Al additives.

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Effect of alloying elements and processing factors on the microstructure and hardness of sintered and induction-hardened Fe–C–Cu alloys

Cited by 24 publications

References 14 publications

Effect of porosity, density and temperature on microstructure and mechanical behavior of hybrid premix sponge ferrous compact

Effect of porosity, density and temperature on microstructure and mechanical behavior of hybrid premix sponge ferrous compact

Microstructural association between mechanical behavior with bending fracture surfaces in Astaloy CrA sintered parts alloyed by Cu and C

The influence of alloying elements on tribological properties of Fe-Cu-C based metal matrix composite bearing materials produced by powder metallurgy

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