caa a22 4500 463223578 CHVBK 20180405153220.0 cr unu---uuuuu 170326e20071001xx s 000 0 eng 10.1007/s10853-007-1817-1 doi (NATIONALLICENCE)springer-10.1007/s10853-007-1817-1 Influence of mechanical working on properties of aluminium base short steel fiber reinforced composites [Elektronische Daten] [Durbadal Mandal, B. Dutta, S. Panigrahi] In the present investigation aluminium base short plain steel fiber, copper and nickel coated steel fiber reinforced composites were prepared by vortex method. These were subsequently given deformation upto 40% by hot rolling. Microstructure of deformed sample showed random orientation of fibers. Breakdown of fibers due to the hot rolling was also predominant. Density of composites increased with increase in % of deformation due to reduced porosity. The hardness and strength improvement observed is attributed to decrease in porosity and increase in the number of fibers due to fiber breakage. In case of copper-coated fiber reinforced composite some additional mechanism is observed to operate. After 40% rolling, porosity level of 5-wt% copper coated fiber composites was decreased from 3.9% to 0.7%. Hardness of as cast Al-5FeCu composite was 38.2 BHN, which increased to 45.8 BHN on 40% reduction. UTS (Ultimate tensile strength) of 5-wt% copper coated steel fiber composites increased from 124MPa to 145MPa on 40% deformation along with an improvement of percentage of elongation from 9.2 to 11.6. The simultaneous increase in UTS and percentage of elongation indicate that reduction in porosity is the main factor-giving rise to improvement of the properties. Fracture surface investigation showed that cracks are initiated at the fiber matrix interface, propagated through the interface and linked up with other cracks or fiber/matrix interface leading to failure. In case of as cast composites micro-porosity played a vital role in failure which is noted from SEM fractographs. Springer Science+Business Media, LLC, 2007 Mandal Durbadal Metal Extraction and Forming Division, National Metallurgical Laboratory, 831007, Jamshedpur, India aut Dutta B. Metallurgical and Materials Engineering Department, Indian Institute of Technology, 721302, Kharagpur, India aut Panigrahi S. Metallurgical and Materials Engineering Department, Indian Institute of Technology, 721302, Kharagpur, India aut Journal of Materials Science Springer US; http://www.springer-ny.com 42/20(2007-10-01), 8622-8628 0022-2461 42:20<8622 2007 42 10853 https://doi.org/10.1007/s10853-007-1817-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-007-1817-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Mandal Durbadal Metal Extraction and Forming Division, National Metallurgical Laboratory, 831007, Jamshedpur, India aut NATIONALLICENCE 700 1- Dutta B. Metallurgical and Materials Engineering Department, Indian Institute of Technology, 721302, Kharagpur, India aut NATIONALLICENCE 700 1- Panigrahi S. Metallurgical and Materials Engineering Department, Indian Institute of Technology, 721302, Kharagpur, India aut NATIONALLICENCE 773 0- Journal of Materials Science Springer US; http://www.springer-ny.com 42/20(2007-10-01), 8622-8628 0022-2461 42:20<8622 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer