The mechanical properties of in-situ composites

Aikin, Robert M.

doi:10.1007/bf02914400

Cited by 132 publications

(71 citation statements)

References 45 publications

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“…In situ fabrication processes are known to have more advantages for the composite materials in comparison with the ex situ process due to higher interfacial strength in the clean particle-matrix, fine reinforcement size, and homogeneous particle-size distribution [1].…”

Section: Introductionmentioning

confidence: 99%

Effect of Mechanical Activation on the In Situ Formation of TiB2 Particulates in the Powder Mixture of TiH2 and FeB

Huynh¹,

Kim²,

Kim³

2017

Archives of Metallurgy and Materials

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The in situ formation of TiB 2 particulates via an interface reaction between Ti and FeB powders was studied. The effects of mechanical activation by high-energy milling on the decomposition of TiH 2 and the interface reactions between Ti and FeB powders to form TiB 2 were investigated. Powder mixtures were fabricated using planetary ball-milling under various milling conditions. The specific ball-milling energy was calculated from the measured electrical power consumption during milling process. High specific milling energy (152.6 kJ/g) resulted in a size reduction and homogeneous dispersion of constituent powders. This resulted in a decrease in the decomposition temperature of TiH 2 and an increase in the formation reaction of TiB 2 particulates in the Fe matrix, resulting in a homogeneous microstructure of nanoscale TiB 2 evenly distributed within the Fe matrix. In contrast, the powder mixture milled with low specific milling energy (36.5 kJ/g) showed an inhomogeneous microstructure composed of relatively large Fe-Fe 2 B particles surrounded by a thin layer of Fe-TiB 2 within a finely dispersed Fe-TiB 2 matrix region.

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Section: Introductionmentioning

confidence: 99%

Effect of Mechanical Activation on the In Situ Formation of TiB2 Particulates in the Powder Mixture of TiH2 and FeB

Huynh¹,

Kim²,

Kim³

2017

Archives of Metallurgy and Materials

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“…The results show the average of 5 cylindrical specimens with a diameter of 8±0,12 mm, L 0 = 45pm 1, R => 5 and L => 60mm. A slight increase in the mechanical properties was measured in the reinforced material probably achieved through strengthening mechanisms associated with such composite materials such as the increase in the density of dislocations produced by the mismatch of the CTE [22][23][24][25][26][27] of the matrix and the ceramic particles or the load transference to the particles. The homogeneization in the porosity distribution and decrease in the presence of large pores in the composite samples appreciated in the metallographic observations must also play an important role in the measured increase in mechanical properties.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Analysis of the Solidification and Properties of Plaster Cast Al Based Composites

Egizabal¹,

Romero²,

Torregaray³

2012

Archives of Metallurgy and Materials

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The present work deals with aspects related to the solidification and properties of an Al-Si10Mg/SiC 20p alloy cast in plaster moulds. Several strategies were followed to shorten its solidification time such as embedding copper tubes into the mould to make circulate cooling fluids immediately after the casting step. The analysis of cooling curves provided valuable information on the effect of the particles on solidification events. The precipitation of different phases of the MMC takes place at higher temperatures and earlier than in the case of the non reinforced alloy. Particles affect the solidification pattern of the alloy and play a noticeable role in the precipitation of the phases. This fact should be taken into account to design the filling and feeding systems correctly and for modelling and processing parameters as well as in thermal treatments. Eventually samples were obtained under the highest solidification rate conditions to analyse the microstructure and tensile properties of the MMC material.Keywords: F3S.20S, MMCs, lost wax, plaster casting, solidification Praca przedstawia aspekty związane z krzepnięciem i właściwościami stopów Al-Si10Mg/SiC20p odlewanych w formach gipsowych. Aby skrócić czas krzepnięcia stopu testowano kilka strategii, takich jak osadzanie rur miedzianych w formie aby umożliwić obieg cieczy chłodzących natychmiast po odlaniu stopu. Analiza krzywych chłodzenia dostarczyłacennych informacji na temat wpływu cząstek na proces krzepnięcia. Wydzielanie różnych faz w kompozytach metalowo-ceramicznych odbywa się w wyższych temperaturach i wcześniej, niż w przypadku nieumacnianego stopu. Cząstki wpływają na schemat krzepnięcia stopu i odgrywają zauważalną rolę w wydzielaniu faz. Fakt ten powinien być brany pod uwagę przy projektowaniu prawidło-wego systemu zalewania formy, modelowaniu parametrów procesu, jak również obróbki cieplnej. Na koniec pobrano próbki otrzymane przy najwyższej szybkości krzepnięcia do analizy mikrostruktury i właściwości wytrzymałościowych kompozytu metalowo-ceramicznego.

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“…Particles reinforced magnesium matrix composites have made great progress. However, the factors such as particle uniformity, interface infiltration, reaction, and type, size, quantity of enhanced particle and so on are controlled by the nucleation and the growth kinetics, so further studies will be perfected (Aikin.,1997).…”

Section: Az91 Magnesium Alloy Base Compound Materials Researchmentioning

confidence: 99%

The Recent Research on Properties of Anti-High Temperature Creep of AZ91 Magnesium Alloy

Ai¹,

Quan²

2011

Magnesium Alloys - Design, Processing and Properties

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The mechanical properties of in-situ composites

Cited by 132 publications

References 45 publications

Effect of Mechanical Activation on the In Situ Formation of TiB2 Particulates in the Powder Mixture of TiH2 and FeB

Effect of Mechanical Activation on the In Situ Formation of TiB2 Particulates in the Powder Mixture of TiH2 and FeB

Analysis of the Solidification and Properties of Plaster Cast Al Based Composites

The Recent Research on Properties of Anti-High Temperature Creep of AZ91 Magnesium Alloy

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