Effect of copper on the mechanical properties of alloys formed by powder metallurgy

Wong-Angel, W.D.; Téllez-Jurado, Lucía; Chavez, Juan Carlos; Chavira-Martínez, Elizabeth; Verduzco-Cedeño, V.F.

doi:10.1016/j.matdes.2014.02.002

Cited by 50 publications

(16 citation statements)

References 10 publications

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“…As the samples are cuboids, the density can be calculated by the quality-volume method. The P/M samples and their parameters are given in Table 1 .It should be noted that the material has higher porosity, ranging from 47.50% to 60%, while the porosity of normal P/M material is about 5%–15% [ 26 ].…”

Section: Resultsmentioning

confidence: 99%

Compressibility of 304 Stainless Steel Powder Metallurgy Materials Reinforced with 304 Short Stainless Steel Fibers

et al. 2016

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Powder metallurgy (P/M) technique is usually used for manufacturing porous metal materials. However, some P/M materials are limitedly used in engineering for their performance deficiency. A novel 304 stainless steel P/M material was produced by a solid-state sintering of 304 stainless steel powders and 304 short stainless steel fibers, which were alternately laid in layers according to mass ratio. In this paper, the compressive properties of the P/M materials were characterized by a series of uniaxial compression tests. The effects of fiber content, compaction pressure and high temperature nitriding on compressive properties were investigated. The results indicated that, without nitriding, the samples changed from cuboid to cydariform without damage in the process of compression. The compressive stress was enhanced with increasing fiber content ranging from 0 to 8 wt.%. For compaction pressure from 55 to 75 MPa, greater compaction pressure improved compressive stress. Moreover, high temperature nitriding was able to significantly improve the yield stress, but collapse failure eventually occurred.

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Section: Resultsmentioning

confidence: 99%

Compressibility of 304 Stainless Steel Powder Metallurgy Materials Reinforced with 304 Short Stainless Steel Fibers

et al. 2016

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“…In this study, the deep cryogenic treatment was adopted to study its effect on microstructures and tribological properties of iron matrix composites. MoS 2 and graphite were used as solid lubricants which play a key role in lubrication in the composites [30][31][32], and Cu was satisfied with the liquid phase sintering for iron matrix materials and can also fill the gaps of materials during the sintering process [28,33]. The NiWGr powers were used to enhance the strength of composites [32].…”

Section: Introductionmentioning

confidence: 99%

Effects of Deep Cryogenic Treatment on the Microstructures and Tribological Properties of Iron Matrix Self-Lubricating Composites

Peng

Zhang

Chen

et al. 2018

Metals

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Abstract:The effects of deep cryogenic treatment on the microstructures and tribological properties of the self-lubricating iron matrix composites are investigated. The self-lubricating composites are deeply cryogenically treated at about −196 • C. The results show that with deep cryogenic treatment, the martensite phase transformation occurred from phase γ to α , and the fine particle carbides precipitated between martensites with the extension of cryogenic treatment time, measured by X-ray diffractometry (XRD) and scanning electron microscope (SEM). Compared with the as-sintered specimen, the maximum hardness of the specimens processed by cryogenic treatment increases by 172.8% from 253.2 HV to 690.7 HV. The materials with deep cryogenic treatment for 8 h show the best tribological properties, i.e., the average friction coefficient decreases by 75% from 0.36 to 0.09, and the wear coefficient decreases by 63% from 341 to 126 × 10 −6 mm 3 /Nm at 150 N and 8 mm/s. The improvement of the tribological property can be primarily attributed to the martensite phase transformation from γ to α and the precipitation of fine particles carbides between the martensites, which increase the hardness and the wear resistance after the cryogenic treatment.

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“…Fe-Cu is a commonly utilized material in powder metallurgy (PM), where copper acts as an alloying element and is not sensitive to oxidation [1-2]. Copper (Cu) is the most common alloying element added in powder form because of its low cost, availability and ability to improve the properties of alloys [3]. Cu as an alloying substance has unique properties in the field of sintered steels where it improves strength and rust resistance.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and densification behavior of liquid phase sintered Fe-Cu alloy powder using cold and hot compaction techniques

Nassef¹,

Alateyah²,

El-Hadek³

et al. 2017

Adv. Mater. Lett.

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The physical and mechanical properties of atomized prealloyed Fe-Cu powders, blended with different amounts of liquid additions of lead (Pb), were studied in the as-sintered condition and hot compaction techniques. The influence of Pb content, compacting pressure and temperature on the densification, hardness, and the mechanical properties were investigated. During hot compaction, at a temperature of 500°C, the Pb liquid was found to spread uniformly among Fe-Cu solid particles. The effect of pores in Fe-Cu-Pb alloys, generated by sintering with transient liquid phase, had been studied. An attempt was made in order to study the properties of Fe-Cu-Pb particles and their behaviour, with respect to the consolidation of Fe-Cu-Pb powders. The density values of cold and hot compacts, at various pressures and temperatures values, were reported. The microstructure, hardness, and strength measurements were found to be dependent upon the compacting pressure. For the cold compacted alloys, the Pb powder particles were completely melted to form liquid pools. In addition, increasing the Pb content in the alloy matrix revealed a decrease of the pores percentage, hence the sample became denser. On the other hand, grain was found to be coarser and less porosity is obtained with increasing the Pb content in the hot compacted. It is found that, increasing the compacting pressure of the cold and hot compacted samples revealed a homogenous, fine grain, and small pores appeared around the grain boundaries. The mechanical properties data showed improvement in the strength and hardness of the hot and cold compacted samples by increasing either the compaction pressure or temperature.

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Effect of copper on the mechanical properties of alloys formed by powder metallurgy

Cited by 50 publications

References 10 publications

Compressibility of 304 Stainless Steel Powder Metallurgy Materials Reinforced with 304 Short Stainless Steel Fibers

Compressibility of 304 Stainless Steel Powder Metallurgy Materials Reinforced with 304 Short Stainless Steel Fibers

Effects of Deep Cryogenic Treatment on the Microstructures and Tribological Properties of Iron Matrix Self-Lubricating Composites

Microstructure and densification behavior of liquid phase sintered Fe-Cu alloy powder using cold and hot compaction techniques

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