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Dynamics of Ultrafast Laser Induced Damage in Single Crystal Ni-based Superalloy During Machining

Published online by Cambridge University Press:  26 February 2011

Joel P. McDonald ,
Shuwei Ma ,
John A. Nees ,
Tresa M. Pollock  and
Steven M. Yalisove
Joel P. McDonald
Affiliation:
jpmcdona@umich.edu, University of Michigan, Applied Physics, B122 Gerstacker Building, 2200 Bonisteel Blvd., Ann Arbor, MI, 48109, United States, 734-647-9498
Shuwei Ma
Affiliation:
mashuwei@umich.edu, University of Michigan, Materials Science and Engineering, Ann Arbor, MI, 48109, United States
John A. Nees
Affiliation:
nees@umich.edu, University of Michigan, Center for Ultrafast Optical Science, Ann Arbor, MI, 48109, United States
Tresa M. Pollock
Affiliation:
tresap@umich.edu, University of Michigan, Materials Science and Engineering, Ann Arbor, MI, 48109, United States
Steven M. Yalisove
Affiliation:
smy@umich.edu, University of Michigan, Materials Science and Engineering, Ann Arbor, MI, 48109, United States
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Abstract

Pump-probe imaging of femtosecond pulsed laser ablation was performed to investigate the mechanical shock induced on an intermetallic superalloy CMSX-4 during femtosecond laser machining. Time resolved shadowgraphic images were collected of the shock wave produced in the air above the target following laser exposure (0-10.3 nanoseconds). The dimensions of the shock wave were measured as a function of delay time and laser fluence (1.27 J/cm2 - 62.8 J/cm2). Time-resolved shadowgraphic images of the ablation event will be presented, and the corresponding damage morphology as a function of incident laser fluence will be discussed.

Keywords

laser ablationNimachining
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 980: Symposium II – Advanced Intermetallic-Based Alloys , 2006 , 0980-II05-31
Copyright
Copyright © Materials Research Society 2007

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