Pub Date : 2020-01-01DOI: 10.1504/ijmmm.2020.10030613
Hassan El Hofy, Mohamed O. Helmy, M. E. Hofy
{"title":"Influence of process parameters on the ultrasonic assisted edge trimming of aerospace CFRP laminates using MQL","authors":"Hassan El Hofy, Mohamed O. Helmy, M. E. Hofy","doi":"10.1504/ijmmm.2020.10030613","DOIUrl":"https://doi.org/10.1504/ijmmm.2020.10030613","url":null,"abstract":"","PeriodicalId":55894,"journal":{"name":"International Journal of Machining and Machinability of Materials","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66738681","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-01DOI: 10.1504/ijmmm.2020.10030615
M. Law, T. Jagadeesha, N. Subhash
Super duplex stainless steels (SDSSs) combine austenite and ferrite in near equal proportions along with other alloying elements giving these steels excellent mechanical and chemical properties and making them of much use across industries. The same characteristics that give SDSS advantageous properties impair their machinability and make cutting of SDSS prone to unstable process-induced chatter vibrations. The focus of this paper is to hence investigate the machinability and machining stability of dry turning SDSS. Based on systematic experimental characterisation, we identify cutting force coefficients that characterise machinability and observe these coefficients to be relatively speed independent. We further observe surface characteristics to improve with cutting speeds. Using identified coefficients and measured dynamics, we predict the stability behaviour. Experimental validation confirms that the nose radius on cutting tools plays a significant role in improving the chatter vibration-free turning of SDSS. Our findings can instruct highperformance strategies for turning of SDSS.
{"title":"Investigations on machinability and machining stability of turning super duplex stainless steel","authors":"M. Law, T. Jagadeesha, N. Subhash","doi":"10.1504/ijmmm.2020.10030615","DOIUrl":"https://doi.org/10.1504/ijmmm.2020.10030615","url":null,"abstract":"Super duplex stainless steels (SDSSs) combine austenite and ferrite in near equal proportions along with other alloying elements giving these steels excellent mechanical and chemical properties and making them of much use across industries. The same characteristics that give SDSS advantageous properties impair their machinability and make cutting of SDSS prone to unstable process-induced chatter vibrations. The focus of this paper is to hence investigate the machinability and machining stability of dry turning SDSS. Based on systematic experimental characterisation, we identify cutting force coefficients that characterise machinability and observe these coefficients to be relatively speed independent. We further observe surface characteristics to improve with cutting speeds. Using identified coefficients and measured dynamics, we predict the stability behaviour. Experimental validation confirms that the nose radius on cutting tools plays a significant role in improving the chatter vibration-free turning of SDSS. Our findings can instruct highperformance strategies for turning of SDSS.","PeriodicalId":55894,"journal":{"name":"International Journal of Machining and Machinability of Materials","volume":"42 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66738728","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-01DOI: 10.1504/ijmmm.2020.10027931
S. Sivakumar, M. A. Khan, B. Muralidharan
{"title":"Studies on surface quality of stainless-steel implant material while machining with WEDM process","authors":"S. Sivakumar, M. A. Khan, B. Muralidharan","doi":"10.1504/ijmmm.2020.10027931","DOIUrl":"https://doi.org/10.1504/ijmmm.2020.10027931","url":null,"abstract":"","PeriodicalId":55894,"journal":{"name":"International Journal of Machining and Machinability of Materials","volume":"22 1","pages":"374"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66738664","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-01DOI: 10.1504/ijmmm.2020.10033217
C. Jawalkar, A. Sharma, Pradeep Kumar
{"title":"Innovations in electro chemical discharge machining process through electrolyte stirring and tool rotations","authors":"C. Jawalkar, A. Sharma, Pradeep Kumar","doi":"10.1504/ijmmm.2020.10033217","DOIUrl":"https://doi.org/10.1504/ijmmm.2020.10033217","url":null,"abstract":"","PeriodicalId":55894,"journal":{"name":"International Journal of Machining and Machinability of Materials","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66739083","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-01DOI: 10.1504/ijmmm.2020.10028410
Ernesto Córdoba Nieto, Jorge Andrés García Barbosa
{"title":"An approach to residual stress measurement in ball-end milling process on Ti-6Al-4V ELI titanium alloy","authors":"Ernesto Córdoba Nieto, Jorge Andrés García Barbosa","doi":"10.1504/ijmmm.2020.10028410","DOIUrl":"https://doi.org/10.1504/ijmmm.2020.10028410","url":null,"abstract":"","PeriodicalId":55894,"journal":{"name":"International Journal of Machining and Machinability of Materials","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66738674","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-01DOI: 10.1504/ijmmm.2020.10030619
B. Aboagye, S. T. Appiah, Tainyao Zhang, J. Puoza
{"title":"Chamfer drill geometric parameters optimisation by finite element simulation and experimental analysis","authors":"B. Aboagye, S. T. Appiah, Tainyao Zhang, J. Puoza","doi":"10.1504/ijmmm.2020.10030619","DOIUrl":"https://doi.org/10.1504/ijmmm.2020.10030619","url":null,"abstract":"","PeriodicalId":55894,"journal":{"name":"International Journal of Machining and Machinability of Materials","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66738773","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-01DOI: 10.1504/ijmmm.2020.10033216
F. Blanchet, F. Lachaud, R. Piquet, Y. Landon
{"title":"Experimental study of orthogonal cutting of unidirectional CFRP laminates","authors":"F. Blanchet, F. Lachaud, R. Piquet, Y. Landon","doi":"10.1504/ijmmm.2020.10033216","DOIUrl":"https://doi.org/10.1504/ijmmm.2020.10033216","url":null,"abstract":"","PeriodicalId":55894,"journal":{"name":"International Journal of Machining and Machinability of Materials","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66739075","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-01DOI: 10.1504/ijmmm.2020.10033218
B. Z. Balázs, M. Takács
{"title":"Experimental investigation of surface characteristics and dynamic effects at micro milling of hardened hot-work tool steel","authors":"B. Z. Balázs, M. Takács","doi":"10.1504/ijmmm.2020.10033218","DOIUrl":"https://doi.org/10.1504/ijmmm.2020.10033218","url":null,"abstract":"","PeriodicalId":55894,"journal":{"name":"International Journal of Machining and Machinability of Materials","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66739119","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-01DOI: 10.1504/IJMMM.2019.10022891
C. Pagano, A. Attanasio, L. Rebaioli, E. Ceretti, I. Fassi
The interest in the application of carbon nanotube (CNT) composites is recently increasing in several industrial sectors. The main reason for this growing attention is the reinforcing effect of the CNTs. However, the composite use is limited by technological issues concerning the manufacturing processes when small features are required. A multistage process chain could exploit the advantages of suitable processes to enhance the control of the filler orientation. This paper investigates the feasibility of milling micro features on micro injected specimens of POM/CNT and LCP/CNT composites. Design of experiment is used to study a suitable experimental design to investigate the influence of the material and the process parameters on the machinability and the feature geometry. POM-based composites showed a better machinability and allowed a fabrication of more accurate features, while LCP showed high cutting forces and the presence of diffused burrs, preventing the fabrication of very small features.
{"title":"Micro milling of polymeric micro injected specimens with randomly oriented carbon nanotube fillers","authors":"C. Pagano, A. Attanasio, L. Rebaioli, E. Ceretti, I. Fassi","doi":"10.1504/IJMMM.2019.10022891","DOIUrl":"https://doi.org/10.1504/IJMMM.2019.10022891","url":null,"abstract":"The interest in the application of carbon nanotube (CNT) composites is recently increasing in several industrial sectors. The main reason for this growing attention is the reinforcing effect of the CNTs. However, the composite use is limited by technological issues concerning the manufacturing processes when small features are required. A multistage process chain could exploit the advantages of suitable processes to enhance the control of the filler orientation. This paper investigates the feasibility of milling micro features on micro injected specimens of POM/CNT and LCP/CNT composites. Design of experiment is used to study a suitable experimental design to investigate the influence of the material and the process parameters on the machinability and the feature geometry. POM-based composites showed a better machinability and allowed a fabrication of more accurate features, while LCP showed high cutting forces and the presence of diffused burrs, preventing the fabrication of very small features.","PeriodicalId":55894,"journal":{"name":"International Journal of Machining and Machinability of Materials","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66738503","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-01DOI: 10.1504/ijmmm.2020.10025676
H. Jailani, M. Murugan, S. Jeavudeen
Electrical discharge machining (EDM) is used to machine difficult-to-machine materials having high hardness and toughness. One of the recent advancements in the EDM process is the powder mixed electrical discharge machining (PMEDM) process, in which the metallic or abrasive additives in the form of fine powders are added to the dielectric fluid. PMEDM was found to improve machinability in terms of higher material removal rate (MRR) and enhanced tool wear index (TWI), by reducing the breakdown strength of the dielectric. In PMEDM process, machining happens with relatively larger spark gap with enhanced machining characteristics. This paper investigates the influence of powder mixing on the breakdown strength of the liquid dielectric and the gap voltage. Determination of dielectric strength was carried out with a specially designed experimental set-up adhering to ASTM standard D1816 - 97. Tests were conducted using silicon carbide, alumina, copper and aluminium powders. The effect of varying the grain size was also studied. An experimental set-up was also designed and realised to measure the influence of powder mixing on the gap voltage and MRR in machining of titanium alloy. The results have shown significant improvement in MRR and TWI.
{"title":"Powder additives influence on dielectric strength of EDM fluid and material removal","authors":"H. Jailani, M. Murugan, S. Jeavudeen","doi":"10.1504/ijmmm.2020.10025676","DOIUrl":"https://doi.org/10.1504/ijmmm.2020.10025676","url":null,"abstract":"Electrical discharge machining (EDM) is used to machine difficult-to-machine materials having high hardness and toughness. One of the recent advancements in the EDM process is the powder mixed electrical discharge machining (PMEDM) process, in which the metallic or abrasive additives in the form of fine powders are added to the dielectric fluid. PMEDM was found to improve machinability in terms of higher material removal rate (MRR) and enhanced tool wear index (TWI), by reducing the breakdown strength of the dielectric. In PMEDM process, machining happens with relatively larger spark gap with enhanced machining characteristics. This paper investigates the influence of powder mixing on the breakdown strength of the liquid dielectric and the gap voltage. Determination of dielectric strength was carried out with a specially designed experimental set-up adhering to ASTM standard D1816 - 97. Tests were conducted using silicon carbide, alumina, copper and aluminium powders. The effect of varying the grain size was also studied. An experimental set-up was also designed and realised to measure the influence of powder mixing on the gap voltage and MRR in machining of titanium alloy. The results have shown significant improvement in MRR and TWI.","PeriodicalId":55894,"journal":{"name":"International Journal of Machining and Machinability of Materials","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66738606","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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