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Experimental investigation and machining analysis of Mg/TiC composites during EDM

Dash Dharmeswar, Devarajaiah Devarasiddappa, Dash Santosh Kumar, Samanta Sutanu, Rai Ram Naresh

Composites Theory and Practice

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2024

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R. 24, nr 1

9--16

EN

Electrical discharge machining (EDM) is one of the prominent non-conventional machining processes used to machine metal matrix composites. Mg/TiC composites are found in many industrial applications and conventional machining of the same is highly challenging. This paper aims to study the machinability analysis of Mg/TiC composites using EDM with pulseon time (Ton), pulse-off time (Toff) and input current (I) as the process variables with the material removal rate (MRR) and surface roughness (SR) as the performance measures. Stir cast Mg-alloy reinforced with TiC (0, 5, 10, 15 and 20) by weight was used as the workpiece. The EDM experiments were conducted as per L25 orthogonal array (OA) and the results were analyzed to study the effect of the process variables on MRR and SR. The parametric study showed that SR increases linearly with Ton and is attributed to larger craters produced at a higher pulse energy. MRR was also observed to grows with the rise in Ton as more material melts due to high-intensity pulses. As per the ANOVA results, Ton was found to be the most influential process variable affecting SR and MRR with a 79% and 34% contribution, respectively. Surface morphology investigations using SEM micrographs revealed the presence of globules and sphere-shaped metal deposits and were found responsible for increased SR.

2

Stopy magnezu do przeróbki plastycznej

Sułkowski B.

Stal, Metale & Nowe Technologie

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2015

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nr 5-6

64--65

PL

W artykule opisano stopy magnezu przeznaczone do przeróbki plastycznej. Przedstawiono bardzo ważne aspekty przeróbki plastycznej stopów magnezu, takie jak: bliźniakowanie, formowanie i wpływ tekstury, odkształcenie na zimno i na gorąco. Opisano najważniejsze metody przeróbki plastycznej magnezu, takie jak: walcowanie, wyciskanie, kucie, podając najistotniejsze parametry procesów. Opisano również stopy magnezu serii Mg-Al-Zn, Mg-Zn-Zr i Mg-Zn-Mn oraz kilka innych.

3

Magnez przemysłu. Przykłady zastosowań stopów magnezu

Karaś M.

Stal, Metale & Nowe Technologie

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2015

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nr 5-6

154--155

PL

Magnez to lekki metal stosowany jako materiał konstrukcyjny. Ze względu na swoje właściwości znalazł zastosowanie w przemyśle lotniczym, motoryzacyjnym i elektronicznym. Przedmiotem rozważań tego artykułu będzie zastosowanie magnezu w wymienionych przemysłach na konkretnych przykładach.

4

Assessment of strategic development perspectives of laser treatment of casting magnesium alloys

Dobrzańska-Danikiewicz A., Tański T., Malara Sz., Domagała-Dubiel J.

Archives of Materials Science and Engineering

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2010

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Vol. 45, nr 1

5-39

EN

Purpose: The purpose of this paper is to assess the strategic perspectives of laser treatment of casting magnesium alloys such as MCMgAl12Zn1 MCMgAl9Zn1, MCMgAl6Zn1, MCMgAl3Zn1 using carbide TiC, WC, VC, SiC and Al2O3 oxide powders. The type of powder was taken as a criterion for the technology groups distinguishing in that way five groups of technologies for further research studies. Design/methodology/approach: In the framework of foresight-materials science researches: the dendrological matrix of technology value, the meteorological matrix of environment influence and the matrix of strategies for technology with the strategic development tracks were made, such researches as: X-ray microanalysis, qualitative X-ray analysis, hardness tests and roughness measurements were carried out under the scanning electron microscope and the light microscopy, as well as technology roadmaps were prepared. Findings: The outcarried researches pointed out very high potential and attractiveness of the given technologies in the background environment and the promising improvement of mechanical properties of examined materials. Research limitations/implications: Described materials science and foresight research concerning the cladding and remelting of carbides and oxides in the surface of casting magnesium alloys are a part of a wider research project aiming to define, examine and characterise innovative technology of surface engineering of engineering materials. Practical implications: The presented results of experimental materials science researches prove a significant positive effect of laser treatment with the use of carbides and oxides on the structure and properties of casting magnesium alloys that is why it is legitimate that they are included in the set of innovative technologies qualified for use in an industrial practice including small and medium enterprises. Originality/value: The value of this paper is to determine the value of laser treatment technology of casting magnesium alloys in the background environment with recommended procedure strategies, the strategic development tracks and technology roadmaps including the influence of this treatment on the quality, microstructure and properties of surface layers obtained by cladding and remelting casting magnesium alloys.