Fabrication of Al6061 composite with high SiC particle loading by semi-solid powder processing

Wu, Yufeng; Kim, Gap-Yong; Anderson, Iver E.; Lograsso, Thomas A.

doi:10.1016/j.actamat.2010.04.036

Cited by 67 publications

(19 citation statements)

References 41 publications

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“…Zu and Luo [4] studied semi-solid powder forming (SPF) and Wu discussed various processing routes of SPF for Al alloys. [5][6][7][8] Hamilton et al [9] proposed a novel technique, a direct powder semi-solid forming (DPSF) process, to prepare particle reinforced metal-matrix composites (PMMCs), which is also based on semi-solid for ming technique and powder metallurgy. In general, SPF and DPSF are mainly applied in the extrusion and compaction tests to prepare bulk materials, while SSPR is mainly used to prepare strips.…”

Section: Introductionmentioning

confidence: 99%

Semi-solid Powder Rolling of AA7050 Alloy Strips: Densification and Deformation Behaviors

Luo

Liu

et al. 2015

Metall Mater Trans A

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Semi-solid powder rolling (SSPR) is a novel strip manufacturing process which combines the features of semi-solid rolling and powder rolling. SSPR involves rolling procedure of metallic alloy powders when both liquid and solid phases coexist. In this study, densification process and deformation mechanisms of AA7050 powder in the presence of liquid phase were investigated. The relationships between the apparent plastic Poisson's ratio and the relative density as well as the thickness reduction ratio and relative density were calculated. The relationship between deformation strain and relative density was calculated as well. The experimental data of relationship between rolling forces and relative density were achieved. The results show that the densification process of SSPR also can be divided into three stages and liquid phase mainly affects stage I. In stage I, semi-solid particles' rearrangement and restacking are the main densification mechanisms when the initial liquid fraction is lower than 20 pct. When the initial liquid fraction is higher than 20 pct, flowing and filling of liquid, semi-solid particles rearrangement and restacking are the densification mechanisms. In stage II, severe deformation of particles associated with a rapid increase in the apparent plastic Poisson's ratio and interparticle contact area contributes to the densification process. In stage III, the densification mechanisms are the deformation and collapse of isolated pores. The calculated deformation strain increases gradually with the same slopes as the relative density increases in stages II and III no matter how much the liquid fraction is. Higher liquid needs less deformation degree that contributes to the densification.

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Section: Introductionmentioning

confidence: 99%

Semi-solid Powder Rolling of AA7050 Alloy Strips: Densification and Deformation Behaviors

Luo

Liu

et al. 2015

Metall Mater Trans A

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“…In Chapter 2, the compaction behavior of powders in the semi-solid state was analyzed, and the pressure- and composite materials including Al-SiC (Guo and Tsao 2000;Chen, Yang et al 2004;Wu 2009;Wu, Kim et al 2010a;Wu, Kim et al 2011) and Al-CNT. Wu et al also demonstrated the effectiveness of semi-solid powder flow in filling the micro-scale features for applications in micro/meso-manufacturing (Wu, Kim et al 2010b).…”

Section: Dissertation Organizationmentioning

confidence: 99%

“…It exploits unique material behavior of solid-liquid slurry, which helps the formation of intricate shapes (Kumar, Martin et al 1993). It also enables mixing of various particle or fiber elements for improved composite properties and eliminates post-processing steps required in powder metallurgy routes (Wu, Kim et al 2010a). According to the SPP experiments carried out by Chen and Yang et al (2005b), four basic steps are generally involved in SPP: powder preparation, powder pre-compaction, heating and semi-solid…”

Section: Introductionmentioning

confidence: 99%

Fabrication of metal matrix composite by semi-solid powder processing

2011

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“…The PTF not only inherits the merits of the PM, but also retains the advantages of thixoforming. So far, the technologies that are most similar to PTF are pseudo-semisolid forming 11,12 and semisolid powder processing 13 . The former has pseudosemisolid forming temperature at which the matrix (Al or Cu) is in liquid state and the reinforcement (SiC p or W p ) is in solid state, and its solid fraction can be as high as 60%-70%.…”

Section: Introductionmentioning

confidence: 99%

Effects of Processing Parameters on Microstructure and Mechanical Properties of Powder-Thixoforged SiC p /6061 Al Composite

et al. 2017

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A novel processing technology for the fabrication of particle reinforced metal matrix composites, powder thixoforming (PTF), was proposed and 6061 Al-based composites reinforced with 10% volume fractions of SiC particles (SiC p ) were fabricated. The effects of processing parameters, such as reheating time, mould temperature and reheating temperature, on its microstructure and mechanical properties were investigated. The results indicated that all the three processing parameters exerted a significant influence on the microstructure and mechanical properties. The behavior of SiC p changes with the processing parameters. The best comprehensive mechanical properties with an ultimate tensile strength (UTS) of 228 MPa, elongation of 5.3% and a Vickers hardness of 66.4 HV are obtained when the composite is thixoforged under the reheating temperature of 660 0C for 90 min and the mould temperature of 250 0C.

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Fabrication of Al6061 composite with high SiC particle loading by semi-solid powder processing

Cited by 67 publications

References 41 publications

Semi-solid Powder Rolling of AA7050 Alloy Strips: Densification and Deformation Behaviors

Semi-solid Powder Rolling of AA7050 Alloy Strips: Densification and Deformation Behaviors

Fabrication of metal matrix composite by semi-solid powder processing

Effects of Processing Parameters on Microstructure and Mechanical Properties of Powder-Thixoforged SiC p /6061 Al Composite

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