The effect of particle shape on ductility of SiCp reinforced 6061 Al matrix composites

Qin, Shuyi; Chen, Changrong; Zhang, Guoding; Wang, Wenlong; Zhongguang, Wang

doi:10.1016/s0921-5093(99)00503-1

Cited by 121 publications

(50 citation statements)

References 20 publications

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“…The mechanical properties improvement in Mg-Ti composite compared to pure Mg (Tables 3 and 4) can be ascribed to the microstructural observations, the inherent properties of Ti particulates and the following strengthening effects: (i) thermal residual stress arising from the mismatch between the thermal expansion coefficients of Mg and Ti; (ii) grain refinement; (iii) the increased stress concentration at the pointed corners of Ti-particles [35]; and (iv) increase in the load carrying capacity due to higher hardness of Ti [31,36,37]. In addition, as reported by various researchers, the difference in CTE values (between the matrix and reinforcements) and the sharp corners of particulate reinforcements contribute to the matrix strengthening through the increased dislocation density at the matrix-reinforcement interface [35][36][37][38][39][40].…”

Section: Influence Of Individual Ti Additionmentioning

confidence: 99%

“…In addition, as reported by various researchers, the difference in CTE values (between the matrix and reinforcements) and the sharp corners of particulate reinforcements contribute to the matrix strengthening through the increased dislocation density at the matrix-reinforcement interface [35][36][37][38][39][40]. The inherent higher tensile and lower compression fracture strain values of Ti have resulted in the increased tensile and poor compressive ductility of Mg-Ti composite [38,40].…”

Section: Influence Of Individual Ti Additionmentioning

confidence: 99%

“…During solidification and subsequent extrusion, these sharp corners of Ti particulates would act as favorable sites for the second phase agglomeration to occur (Cu/Mg 2 Cu formation), due to the high energy and stress concentration associated with irregularly-shaped particulates [32]. Hence, matrix cracking along with Ti-particle debonding would occur preferentially at the sites with intermetallic phases and thus results in the poor ductility [21,22,35]. Figure 6d shows the image of fracture surface seen in Mg-Ti-Cu indicating the brittle fracture with prominent cracking under tension and dominant shear failure under compression as shown in Figure 7d. …”

Section: Influence Of Direct Addition Of Hybrid (Ti and Nano-cu) Metamentioning

confidence: 99%

See 2 more Smart Citations

Influence of Micron-Ti and Nano-Cu Additions on the Microstructure and Mechanical Properties of Pure Magnesium

Seetharaman

Jayalakshmi

Gupta

2012

Metals

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Abstract:In this study, metallic elements that have limited/negligible solubility in pure magnesium (Mg) were incorporated in Mg using the disintegrated melt deposition technique. The metallic elements added include: (i) micron sized titanium (Ti) particulates with negligible solubility; (ii) nano sized copper (Cu) particulates with limited solubility; and (iii) the combination of micro-Ti and nano-Cu. The combined metallic addition (Ti + Cu) was carried out with and without preprocessing by ball-milling. The microstructure and mechanical properties of the developed Mg-materials were investigated. Microstructure observation revealed grain refinement due to the individual and combined presence of hard metallic particulates. The mechanical properties evaluation revealed a significant improvement in microhardness, tensile and compressive strengths. Individual additions of Ti and Cu resulted in Mg-Ti composite and Mg-Cu alloy respectively, and their mechanical properties were influenced by the inherent properties of the particulates and the resulting second phases, if any. In the case of combined addition, the significant improvement in properties were observed in Mg-(Ti + Cu) BM composite containing ball milled (Ti + Cu) particulates, when compared to direct addition of Ti and Cu particulates. The change in particle morphology, formation of Ti 3 Cu intermetallic and good interfacial bonding with the matrix achieved due to preprocessing, contributed to its superior strength OPEN ACCESSMetals 2012, 2 275 and ductility, in case of Mg-(Ti + Cu) BM composite. The best combination of hardness, tensile and compressive behavior was exhibited by Mg-(Ti + Cu) BM composite formulation.

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Section: Influence Of Individual Ti Additionmentioning

confidence: 99%

Section: Influence Of Individual Ti Additionmentioning

confidence: 99%

Section: Influence Of Direct Addition Of Hybrid (Ti and Nano-cu) Metamentioning

confidence: 99%

See 1 more Smart Citation

Influence of Micron-Ti and Nano-Cu Additions on the Microstructure and Mechanical Properties of Pure Magnesium

Seetharaman

Jayalakshmi

Gupta

2012

Metals

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“…(ii) the presence of -Al 2 O 3 might also play a role, (iii) as might the angular form of the F320 Al 2 O 3 particles, which increases stress concentration and tri-axiality in comparison with more rounded AA18 Al 2 O 3 particles [68,69].…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Infiltrated Cu8Al–Ti alumina composites

Krüger

Mortensen

2014

Composites Part A: Applied Science and Manufacturing

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“…It is noted that the classical plasticity theories have already been employed to study the e ects of particle shape [23,24] as well as the particle orientation [4] on the behavior of composites, even though the particle size-dependent behavior has not been the main concern in such studies. Here, the particle size e ects on the behavior of metal matrix composites are investigated in combination with the particle features, which have not been considered up to now.…”

Section: Introductionmentioning

confidence: 99%

Effects of particle shape and size distribution on particle size-dependent flow strengthening in metal matrix composites

Shishvan

Asghari

2017

Scientia Iranica

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Abstract. E ects of particle size on metal matrix composites are studied within the Continuum theory of Mechanism-based Strain Gradient (CMSG) plasticity. This theory has been quite successful in predicting the size-dependent plastic behavior in a wide variety of problems. Two-dimensional (plane-strain) analyses carried out on the composite unit cell models with multi-particles of circular shape show that the ow stress of the composites increases by decreasing particle size with high sensitivity to small particle size. The numerical results are in good agreement with experimental data. Subsequently, the e ects of particle shape, orientation, and size distributions on the behavior of composites are investigated. Analyses are carried out on the composites containing squared, rectangular, and elliptical (with aspect ratio of four) particles of various orientations with respect to the loading direction (i.e., vertical, horizontal, and 45 degree inclined directions). The stress inhomogeneity in the matrix, the overall stress-strain curve, and the maximum principle stress in the particles of composites with non-circular particles are investigated and compared with those obtained for the composites containing circular particles. The e ects of particle size distribution on the behavior of composites are also addressed.

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The effect of particle shape on ductility of SiCp reinforced 6061 Al matrix composites

Cited by 121 publications

References 20 publications

Influence of Micron-Ti and Nano-Cu Additions on the Microstructure and Mechanical Properties of Pure Magnesium

Influence of Micron-Ti and Nano-Cu Additions on the Microstructure and Mechanical Properties of Pure Magnesium

Infiltrated Cu8Al–Ti alumina composites

Effects of particle shape and size distribution on particle size-dependent flow strengthening in metal matrix composites

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