Compaction simulation of crystalline nano-powders under cold compaction process with molecular dynamics analysis

Khoei, A.R.; Sameti, A. Rezaei; Mofatteh, Hossein

doi:10.1016/j.powtec.2020.06.069

Cited by 27 publications

(3 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The comparison of simulation and experimental results proves that the assumed dense volleyball stacking model is simple and effective. A. R. Khoei et al 111 developed an integrated simulation module consisting of inverse optimization and finite element methods using ABAQUS software. The maximum error between densities is 2.3% compared with the experimental results.…”

Section: Power Molding Theoriesmentioning

confidence: 99%

Polymer-based graphene composite molding: a review

Gao

Wang³

et al. 2023

RSC Adv.

View full text Add to dashboard Cite

show abstract

Section: Power Molding Theoriesmentioning

confidence: 99%

Polymer-based graphene composite molding: a review

Gao

Wang³

et al. 2023

RSC Adv.

View full text Add to dashboard Cite

show abstract

“…It is observed that the increased compaction pressure promotes the densification of NiTi composite due to enhanced bonding between matrix materials. Khoei et al 40 reported the three stages of powder densification during uni-axial compaction. In the initial step (stage 1) of densification, the composite powders form in the transitional repositioning in which the powder particles are moved to each other and repacked under compaction pressure.…”

Section: Density and Compressibility Behaviormentioning

confidence: 99%

Physical and Mechanical Behavior of NiTi Composite Fabricated by Newly Developed Uni-Axial Compaction Die

Singh

Sharma²,

Sharma³

2021

Mat. Res.

View full text Add to dashboard Cite

Owing to better mechanical properties and shape memory effect, the NiTi composites fabricated by powder metallurgy are suitable for biomedical implants. However, the excessive porosity and formation of micro-cracks are the major issues related to the NiTi composite. This work focused on developing crack-free dense NiTi composites by newly developed uni-axial compaction die. The work includes the design and manufacturing of uni-axial compaction die. The die was tested by SOLIDWORKS software in a simulated environment. Further, composite samples were successfully fabricated without circumferential micro-cracks at 1910.82 MPa compaction pressure. The effects of compaction pressure on microstructural, densification, and mechanical behavior of NiTi composites were also analyzed. Microstructural characterization shows that the Ni-rich phase increased and the Ti-rich phase decreased with the increase of compaction pressure. The porosity reduces from 17.04 to 8.75% by increasing the compaction pressure from 1273.88 to 1910.82 MPa, and a maximum density of 5.50 g.cm -3 was obtained. The NiTi 150 composite has similar Young's modulus, and compressive strength (6.93 GPa and 94.36 MPa) compared to cortical and cancellous bone. The high compaction pressure also increases the micro-hardness of NiTi composite up to 453.8 HV 0.5 .

show abstract

“…In comparison with casting, PM method resulted to a better microstructural development and greater refinement of grain structure [24]. Considering biomedical applications, PM process is an effective method of fabricating composite materials for human body bio-implant with very safe conditions in the biological environment [25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%