Some aspects of Cold Deformation studies of Al-ZrB2 composites
( Vol-4,Issue-11,November 2017 )

C. Venkatesh, B. Chaitanya, K S M Yadav


Powder metallurgy, ZrB2, Workability, Relative density, Fracture strain.


In the present study Al-ZrB2 composite were made by powder metallurgy route adding different amounts of synthesized ZrB2 powder (2, 4, 6, 8, 10 wt. %). The ZrB2 powder was synthesized by using self-propagating high temperature synthesis (SHS). The samples of different aspect ratios (0.35, 0.5 and 0.65) were made and then sintered at 550oC under continuous argon gas atmosphere in a tubular furnace for 1 hour. The microstructure of the composites had shown that there is no chemical adhesion between Al matrix and ZrB2 reinforcement. Hardness of the composites increased with increase in the amount of ZrB2 reinforcement. The hardness of the composites increased with increase in amount of ZrB2 reinforcement. It was found that the formability stress index increased with the increase of preform fractional density and decreased with the aspect ratio. Relation between various stress ratios, axial strain and relative densities were analyzed. Statistical fitting methods are used on the curve drawn between the axial strain and the stress formability index. The compacts of lower aspect ratio and high initial preform density were found to have a very high fracture strain.

ijaers doi crossref DOI:


Paper Statistics:
  • Total View : 29
  • Downloads : 16
  • Page No: 040-048
Cite this Article:
Show All (MLA | APA | Chicago | Harvard | IEEE | Bibtex)

[1] J. Mascarenhas, Powder metallurgy: a major partner of the sustainable development, Materials Science Forum, 455- 456 (2004), 857–860, doi: 10.4028/ MSF.455-456.857.
[2] Dieter GE, Mechanical Metallurgy, New York: McGraw-Hill 3rd ed., 1981.
[3] A. Riaz Ahamed , P. Asokan and S. Aravindan, EDM of hybrid Al–SiCp–B4Cp and Al–SiCp–Glassp MMCs, Journal Advance Manufacturing Technol (2009) 44:520–528. DOI 10.1007/s00170-008-1839-0.
[4] M. Ramulu, G. Paul and J. Patel, EDM surface effects on the fatigue strength of a 15vol% SiCP/Al metal matrix composite material, Composite structures 54 (2001) 79-86.
[5] Sumathi, M., Selvakumar, N., & Narayanasamy, R., Workability studies on sintered Cu-10SiC preforms during cold axial upsetting, Materials and Design, 39 (2012), 1–8, doi: 10.1016/j.matdes.2012.02.004
[6] Narayanasamy, R., Anandakrishnan, V., & Pandey, K. S., Effect of carbon content on workability of powder metallurgy steels, Materials Science and Engineering A, 494 (2008), 337–342, doi:10.1016/j.msea.2008.04.022
[7] Selvakumar N and Narayanasamy R., Phenomenon of strain hardening behaviour of sintered aluminium preforms during cold axial forming, Journal of Materials Processing Technology, 142 (2003), 347-354, doi:10.1016/S0924-0136(03)00605-8
[8] Harsh Saini, Irfan Khan, Sushil Kumar, Sahil Kumar(2017).Optimization of Material Removal Rate of WEDM Process on Mild Steel Using Molybdenum Wire. International Journal of Advanced Engineering, Management and Science (ISSN: 2454-1311), 3(10), 1001-1005.
[9] Narayanasamy R, Ramesh T and Pandey KS., Some aspects on workability of aluminium–iron powder metallurgy composite during cold upsetting, Materials Science and Engineering, A391 (2005), 418–426, doi: 10.1016/j.msea.2004.09.018