14th International Conference on Shot Peening

WORK HARDENING BY LASER SHOCK PEENING AND SHOT PEENING ON A NICKEL-BASED SINGLE-CRYSTAL SUPERALLOY CMSX-4

Aabid Hakeema, Ivan Bogachevb, Nicolau I. Morara, Kevin M. Knowlesb, Grant J. Gibsonc, Simon Gray

Cranfield University, Manufacturing Dept., Bedfordshire, MK43 0AL, UK

University of Cambridge, Department of Materials Science and Metallurgy, Cambridge, CB3 0FS, UK

Rolls-Royce plc, PO Box 31, Derby, DE24 8BJ, UK

Correspondent author(s): n.i.morar@cranfield.ac.uk, a.hakeem@cranfield.ac.uk

Introduction

Improving the expected life of nickel-based single-crystal superalloy turbine components by work hardening treatments including laser shock peening (LSP) and shot peening (SP) are of particular interest for mitigation of life limiting damage such as environmental assisted cracking in hot section components of gas turbines.

Objectives

The present work studies the effects of LSP and SP on the work hardening of a nickel-based single crystal superalloy CMSX-4®. In addition, to understand the role of work hardening, surface roughness and microhardness post high temperature exposure.