Microstructure and mechanical properties of laser shocked iron-based alloys

The effects of laser shock processing (LSP) on the microstructure and mechanical properties of the low carbon (0.04 wt.%C) and Hadfield manganese (1%C and 14%Mn) steels have been studied. LSP was performed with a 1.054 μm wavelength Nd:phosphate laser operating in a pulse mode (600 ps pulse length and up to 200 J energy) with power densities above 10$\sp{11}$ W/cm$\sp2$. Shock waves were generated by volume expansion of the plasma formed when the material was laser irradiated. Maximum shock wave intensities were obtained using an energy-absorbing black paint coating without a plasma-confining overlay. Maximum modification of the material surface properties and favorable compressive residual stresses were achieved when LSP-induced deformation occurred without melting.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Materials Engineering

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2011

Author dc:creator

• Chu, Jinn P.

Contributors dc:contributor

• Rigsbee, J. Michael

• Engineering, Metallurgy
• Engineering, Materials Science

Statement dc:rights

• Copyright 1992 Chu, Jinn P.

Language dc:language

eng

Identifier

AAI9236428
(UMI)AAI9236428

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/21825