Development, fashion, quality and innovations from SSM to rheocasting processes

• Autorzy: Rosso M.
• Języki publikacji: EN

Abstrakty

EN

Of this paper is to give an overview concerning some alternative methods for the production of enhanced performance light alloys components for critical industrial applications and to present an analysis of a new rheocasting process suitable fpr the manufacturing of high performance industrial components. Design/methodology/approach: Innovative design of some automotive parts, their characterization throught radiographic analysis to verify the integrity of the samples from metallurgical point of view. OM and SEM microstructural characterization, optical microscope, mechanical characterization based on samples machined from the produced parts. Findings: Semi-solid metal (SSM) processes demonstrated their capability to reduce the existing gap between casting and forging and during such a processes there are the opportunity to better control the defect level. Research limitations/implications: The produced parts possess excellent properties, some criticises are related to the use of ceramic cores. There is the need of innovation in industrial design to open the mentalities to new advantageous solutions. Practical implications: The principal goal to improve the competitiveness and energy savings associated to the production in high performance cars was fully accomplished. Originality/value: A study on the feasibility was included opening the route for prototype production characterized by an adequate strength as well as by higher esthetical appearance than the element produced by gravity casting process. The presence of the defects does not negatively influence or compromise the employment of the callipers neither in extreme condition, favouring their use on a very high performance cars. In the future, extension of the proposed process for the production of other important applications are expected.

Słowa kluczowe

EN

aluminium alloys; rheocasting; microstructure; mechanical performance; automotive parts; quality assessment

PL

stopy aluminium; mikrostruktura; właściwości mechaniczne; części samochodowe; ocena jakości

• Wydawca: International OCSCO World Press
• Czasopismo: Archives of Materials Science and Engineering
• Rocznik: 2015
• Tom: Vol. 71, nr 1
• Strony: 16--26
• Opis fizyczny: Bibliogr. 28 poz.

Twórcy

autor

Rosso M.

• Department of Applied Science and Technology. Politecnico di Torino, C.so Duca degli Abruzzi 24, 10129 Torino, Italy

Bibliografia

• [1] T. Haga, P. Kapranos, Simple rheocasting processes, Journal of Material Processing Technology 130-131, (2002) 594-598.
• [2] D.H. Kirkwood, P. Kapranos, Proceedings of the 4th International Conference on Semi-Solid Processing of Alloys and Composites, Sheffield, United Kingdom, 1996.
• [3] Z. Fan, Semisolid metal processing, International Materials Review 47 (2002) 49-85.
• [4] Z. Zhen, Ma. Qian, S. Fan, Z. Ji, The effect of rheo- diecasting on the integrity and mechanical properties of Mg-6Al-lZn, Scripta Materialia 54 (2006) 207-211.
• [5] H.V. Atkinson, D. Liu, Microstructural coarsening of semi-solid aluminium alloys, Materials Science and Engineering A 496/1-2 (2008) 439-446.
• [6] U.A. Curie, G. Govender, Semi-solid rheocasting of grain refined aluminum alloy 7075, Transaction of Nonferrous Metals, Society of China 20/3 (2010) 832-836.
• [7] H.V. Atkinson, Modelling the semisolid processing of metallic alloys, Progress in Materials Science 50 (2005) 341-412.
• [8] T. Haga, P. Kapranos, Simple rheocasting processes, Journal of Material Processing Technology 130-131 (2002) 594-598.
• [9] S. Nafisi, R. Ghomashchi, Grain refining of conventional and semi-solid A356 Al-Si alloy, Journal of Materials Characterization 57 (2006) 371-383.
• [10] M.F. Ashby, K. Johnson, Shaping profiles, Materials and Design, Oxford, Butterworth-Heinemann, Uniteg Kingdom, 2002,246.
• [11] M. Rosso, I. Peter, New frontiers for thixoforming, International Journal of Microstructure and Materials Properties 8/1-2 (2013) 113-124.
• [12] Z. Zhen, Ma. Qian, S. Ji, Z. Fan, The effects of rheo- diecasting on the integrity and mechanical properties of Mg-6Al-lZn, Scripta Materialia 54 (2006) 207-211.
• [13] H. Kaufinann, H. Wabusses, J. Uggowitzer, Aspects of the NRC semi-solid casting technology, Journal of Metallurgical and Processing Technology 76/1-2 (2000) 70-75.
• [14] M. Rosso, I. Peter, G. Chiarmetta, I. Gattelli, Development of industrial components by improved rheocasting system, International Journal of Materials Forming 3/1 (2010) 787-790.
• [15] M. Rosso, I. Peter, G. Chiarmetta, I. Gattelli, Extremely light weight rheocast components for auto motive space frame, Solid State Phenomena 192-193 (2013) 545-550, doi: 10.4028/www. scientific.net/SSP. 192-193.545.
• [16] G. Chiarmetta, Proceedings of 6th International Conference on Semisolid processing of alloys and composites, Turin, Italy, 2000.
• [17] G. Chiarmetta, Proceedings of 4th International Conference on Semi-Solid, Processing of Alloys and Composites, Sheffield, England, 1996, 204-207.
• [18] M. Rosso, E. Romano, P. Giordano, et al. Proceedings of the 7th International Conference on Semi- Solidprocessing of Alloys and Composites, Japan, 151-156,2002.
• [19] M. Rosso, I. Peter, R. Villa, Journal of Solid State Phenomena 141-143 (2008) 237-242.
• [20] A. Fom, S. Menargues, E. Martin, J.A. Picas, Sub Liquidus Casting Technology for the Production of High Integrity Component, Solid State Phenomena 141-143(2008)219-224.
• [21] J.L. Jorstad, The high integrity die casting process. Die casting engineer, Journal of Semi-solid Metal Processing 48/1 (2004) 42-48.
• [22] J. Jorstad, M. Thieman, R. Kamm, Proceedings of the 7th International Conference on Semi-Solidprocessing of Alloys and Composites. Japan, 2002, 701-706.
• [23] M. Rosso, I. Peter, Defect control on Al castings for excellent quality and improved performances through novel Rheocasting processes, TMS Annual Meeting 2(2012) 403-410.
• [24] Gattelli, G. Chiarmetta, M. Boschini, R. Moschini, M. Rosso, I. Peter, New generation of brake callipers to improve competitiveness and energy savings in very high performance cars, diffusion and defect data, Solid State Data. Part b, Solid State Phenomena, 217-218 (2014) 10.
• [25] R. Moschini, R. Molina, Production of hollow components in high pressure die casting through the use of ceramic cores, HTDC, Vicenza, 2012.
• [26] J. Campbell, Castings 2nd edn, Oxford, Butterworth- Heinemann, 2003,443-452.
• [27] J. Campbell, Casting practice, Butterworth Heinemann, Oxford, 2004.
• [28] M. Rosso, V. Malerba, R. Molina, II controllo quality in fonderia ed applicazione della teoria del Bi-film, Trento, Italy, 2012.