R. Prakash Kolli

Research:	Nanoscale Precipitation-Strengthened Steels
Education:	B.S., Mechanical Engineering Rensselaer Polytechnic Institute, 1991 M.S., Mechanical Engineering University of Illinois at Urbana-Champaign, 1993 Ph.D., Materials Science and Engineering Northwestern University, 2007
Publications:	Publications by Kolli in our database
Contact
R. Prakash Kolli Materials Science and Engineering 2220 North Campus Drive Evanston, IL 60208 Phone: 847.491.5946 Email: p-kolli "@" northwestern.edu Fax: 847.467.2269

I completed my B.S. in Mechanical Engineering from Rensselaer Polytechnic Institute, and my M.S. in Mechanical Engineering from the University of Illinois at Urbana-Champaign. I also earned by PE in Mechanical Engineering from the State of Virginia. I completed my Ph.D. in Materials Science and Engineering from Northwestern University. My Ph.D. research was on multi-component structural steels that were strengthened by Cu-rich precipitates homogeneously distributed in the ferritic matrix. These steels also contain NbC carbides, which contribute to the total strengthening. These high-strength low-alloy (HSLA) steels find application in the defense, transportation and infrastructure industries. My thesis focused on the kinetics of the nanoscale Cu-rich precipitates in these copper precipitation-strengthened steels. A significant component of my research was characterizing the steels by atom-probe tomography (APT) employing the Local-Electrode Atom-Probe (LEAP). The steels are also denoted copper steels, Fe-Cu steels, copper precipitation-hardened steels, copper age-hardenable steels and copper-bearing steels.

Publications related to my Ph.D. research.

R. P. Kolli and D. N. Seidman, “Co-Precipitated and Collocated Carbides and Cu-rich Precipitates in a Fe-Cu Steel Characterized by Atom-Probe Tomography,” Microsc. Microanal., 20(6) 1727-1739 (2014). doi: 10.1017/S1431927614013221.

R. P. Kolli and D. N. Seidman, "Heat Treatment of Copper Precipitation-Strengthened Steels," ASM Handbook, Volume 4D, Heat Treating of Irons and Steels, J. Dossett and G. E. Totten (eds.), ASM International, Materials Park, OH, (2014), pp. 188 - 203. [1]

R. P. Kolli and D. N. Seidman, “Coursening kinetics of Cu-rich precipitates in a concentrated multicomponent Fe-Cu based steel,” Int. J. Mater. Res. (formerly Z. Metallkd.), 102(9) 1115-1124 (2011). doi: 10.3139/146.110571.

R. P. Kolli and D. N. Seidman, “The temporal evolution of the decomposition of a concentrated multicomponent Fe-Cu based steel,” Acta Mater., 56(9), 2073-2088 (2008). doi: 10.1016/j.actamat.2007.12.044.

R. P. Kolli, R. M. Wojes, S. Zaucha, and D. N. Seidman, “A subnanoscale study of the nucleation, growth, and coarsening kinetics of Cu-rich precipitates in a multicomponent Fe-Cu based steel”, Int. J. Mater. Res. (formerly Z. Metallkd.), 99(5), 513-527 (2008). doi: 10.3139/146.101662.

S. Vaynman, D. Isheim, R. P. Kolli, S. P Bhat, D. N. Seidman, M. E. Fine, “High-Strength Low-Carbon Ferritic Steel Containing Cu-Fe-Ni-Al-Mn Precipitates,” Metall. Mater. Trans. A, 39(2), 363-373 (2008). doi: 10.1007/s11661-007-9417-x.

R. P. Kolli, Z. Mao, D. T. Keane, D. N. Seidman, “Identification of a Ni_0.5(Al_0.5-xMn_x) B2 phase at the heterophase interfaces of Cu-rich precipitates in an α-Fe matrix,” Appl. Phys. Lett., 91(24), 241903 (2007). doi: 10.1063/1.2820378.

R. P Kolli, “Kinetics of nanoscale Cu-rich precipitates in a multicomponent concentrated steel,” Ph.D. Thesis (2007).

R. P. Kolli and D. N. Seidman, “Comparison of Compositional and Morphological Atom-Probe Tomography Analyses for a Multicomponent Fe-Cu Steel”, Microsc. Microanal., 13(4), 272-284 (2007). doi: 10.1017/S1431927607070675.

D. Isheim, R. P. Kolli, M. E. Fine, D. N. Seidman, “An Atom-Probe Tomographic Study of the Temporal Evolution of the Nanostructure of Fe-Cu Based High-Strength Low-Carbon Steels”, Scripta Mater., 55(1), 35-40 (2006). doi: 10.1016/j.scriptamat.2006.02.040.