Effect of extrusion ratio on the microstructure, texture and mechanical properties of (Mg/AZ91)m–SiCp composite

Roy, Shibayan; Kannan, Ganesa Balamurugan; Suwas, Satyam; Surappa, M.K.

doi:10.1016/j.msea.2014.10.063

Cited by 31 publications

(9 citation statements)

References 41 publications

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“…To characterize the microstructural components from each metallographic sample, 100 fields were analyzed at a magnification of 200 •. The distribution of SiC particles in the matrix was characterized by calculating the distribution factor (DF) as follows [23]:…”

Section: Methodsmentioning

confidence: 99%

Characterization of A356 aluminum matrix composite affected by SiC particle size and extrusion parameters

Rahmanifard

Akhlaghi

2018

International Journal of Materials Research

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The effects of extrusion parameters on the microstructural characteristics and the tensile properties of Al-10 vol.% SiC composites containing three different particle sizes of 38, 62, 82 lm were investigated. The results showed that the tensile properties of the composites were improved with the increase of extrusion ratio only up to 12 : 1 for the extrusion temperatures of 450 and 500 8C, but continued to improve at extrusion temperature of 550 8C due to the considerable reduction in porosity and appropriate alignment of reinforcing phase. Furthermore, the increased extrusion temperature resulted in improvement of elongation and tensile strength at the expense of yield strength. It was found that the extrusion treatment under the conditions of larger sized particles, lower temperature and higher ratio provided more pronounced breakage of SiC particles which could be beneficial if the broken pieces of SiC were totally embedded in the matrix.

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Section: Methodsmentioning

confidence: 99%

Characterization of A356 aluminum matrix composite affected by SiC particle size and extrusion parameters

Rahmanifard

Akhlaghi

2018

International Journal of Materials Research

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“…Figure 6 shows the different grain orientations and inverse pole figures in the forged and extruded alloy. Texture evolution is another important factor influencing the strength of Mg alloys through changing grain orientation, which may have favorable or unfavorable effects on the strength improvement of the alloy [13,14]. In the present study, the slip of the non-basal plane is ignored due to its high critical resolved shear stress in the tensile test at room temperature.…”

Section: Effect Of Precipitate On Strength Improvement Of the Extrudementioning

confidence: 99%

“…improvement of the alloy [13,14]. In the present study, the slip of the non-basal plane is ignored due to its high critical resolved shear stress in the tensile test at room temperature.…”

Section: The Role Of Texture In Strength Improvement Of the Extruded mentioning

confidence: 99%

Effects of Microstructure and Texture Evolution on Strength Improvement of an Extruded Mg-10Gd-2Y-0.5Zn-0.3Zr Alloy

Zhang

Han

Zhou

et al. 2018

Metals

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The extrusion process with a large extrusion ratio (36:1) has a great effect on microstructure refinement and strength improvement of the Mg-10Gd-2Y-0.5Zn-0.3Zr alloy. The tensile yield strength, ultimate tensile strength, and elongation of the extruded alloy are 306MPa, 410MPa, and 16.3%, respectively. The causes of strength improvement of the extruded alloy are discussed in detail. The grain refinement is a main strengthening source, contributing ~67MPa to the tensile yield strength of the extruded alloy. Dense precipitation of long period stacking ordered (LPSO) and β′ phases on the matrix and transformation of texture type in the extrusion process also partly increase the strength. In addition, a small number of {10 1 ¯ 2} twins during tensile test is another factor improving the strength of the extruded alloy.

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“…Rapid solidification processing [14] and disintegrated melt technique [15] minimize the grain boundary segregation due to higher cooling rate to certain extent; however, it is difficult to understand and control the nature of interactive forces, and the solidification variables preciously during large-scale manufacturing of cast composites. Secondary process such as hot extrusion is more often used to bring about uniformity in particle distribution and to eliminate /minimize casting defects in the composites [16]. However, under non optimal conditions this may lead to some level of texture and anisotropy in the particulate MMCs.…”

Section: Introductionmentioning

confidence: 99%

Processing, microstructural evolution and strength properties of in-situ magnesium matrix composites containing nano-sized polymer derived SiCNO particles

Chelliah

Singh

Raj

et al. 2017

Materials Science and Engineering: A

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In-situ Mg matrix composites are fabricated by combining both liquid-and solid-state processing routes. Firstly, liquid polymer was injected into the molten Mg at a temperature of 800 o C to initiate pyrolysis. In-situ pyrolysis aids in the conversion of liquid polymer into sub-micron sized SiCNO particles (mean particle size in the range of 0.5-1 m) and Mg 2 Si particles. Most of the polymer derived SiCNO particles were pushed by the solidification front and as a result segregated at the grain boundaries of as-cast composites (mean grain size in range of 50-65 m) during subsequent solidification process. Formation of Mg 2 Si phase could be minimized by © 2017. This manuscript version is made available under the Elsevier user license http://www.elsevier.com/open-access/userlicense/1.0/ 2reducing the pyrolysis temperature from 800 to 700 o C. Single pass friction stir processing (FSP) of these as-cast composites lead to improved homogeneity in the SiCNO particle distribution, particle refinement (mean particle size of about 200-300 nm) and grain refinement (mean grain size in range of 2.5-3.5 m). Mechanical properties (hardness, compressive yield stress, ultimate compressive stress, strain to failure and strain hardening exponent) of the FS processed composites were enhanced significantly as compared to their as-cast counterparts. Strengthening mechanisms and numerical models are being evoked to explain the observed yield strength in these two stage processed composites.

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Effect of extrusion ratio on the microstructure, texture and mechanical properties of (Mg/AZ91)m–SiCp composite

Cited by 31 publications

References 41 publications

Characterization of A356 aluminum matrix composite affected by SiC particle size and extrusion parameters

Characterization of A356 aluminum matrix composite affected by SiC particle size and extrusion parameters

Effects of Microstructure and Texture Evolution on Strength Improvement of an Extruded Mg-10Gd-2Y-0.5Zn-0.3Zr Alloy

Processing, microstructural evolution and strength properties of in-situ magnesium matrix composites containing nano-sized polymer derived SiCNO particles

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