Journal article
Effect of confinement on surface modification for laser peen forming without protective coating
Surface & coatings technology, Vol.289, pp.194-205
03/15/2016
DOI: 10.1016/j.surfcoat.2016.01.054
Abstract
In this study, multiple laser peen forming (LPF) experiments were conducted for micro-bending aluminum alloy 1060, OHFC copper, and commercially pure titanium specimens under confinement media of water and air. Surface morphological and compositional changes as well as the mechanical properties of the treated specimens were experimentally analyzed to determine the effect of confinement during LPF. Significantly different surface morphological characteristics were captured and quantitatively analyzed. Clear feed mark patterns were found to be caused by the laser pulse feed for all materials under air confinement. Under water confinement, specimen surfaces appeared in a tarnished, featureless surface texture without showing any feed marks. The mechanisms of laser–material interaction during LPF were studied for various materials under different confinement media. The surface chemical composition change was investigated on the surface and in depth. More chemical composition change was observed under air confinement than under water, while it was limited within the topmost 10–30nm under both water and air confinement.
•Clear feed mark patterns were formed on surfaces treated in air, while surfaces treated in water appeared with a featureless texture.•Laser–matter interaction was investigated for various materials under different confinement media.•Phase explosion resulted in remarkable surface morphology change for aluminum and titanium specimens.•Surface composition change was limited to the topmost 10–30nm layer.
Details
- Title: Subtitle
- Effect of confinement on surface modification for laser peen forming without protective coating
- Creators
- Ninggang Shen - University of IowaHongtao Ding - University of IowaQinghua Wang - University of IowaHua Ding - Jiangsu University
- Resource Type
- Journal article
- Publication Details
- Surface & coatings technology, Vol.289, pp.194-205
- DOI
- 10.1016/j.surfcoat.2016.01.054
- ISSN
- 0257-8972
- eISSN
- 1879-3347
- Publisher
- Elsevier B.V
- Grant note
- DOI: 10.13039/501100004921, name: Shanghai Jiao Tong University, award: MSV201514, EPS-1101284; DOI: 10.13039/100008893, name: University of Iowa, award: MSV201514, EPS-1101284; DOI: 10.13039/501100011415, name: State Key Laboratory of Mechanical System and Vibration, award: MSV201514, EPS-1101284; DOI: 10.13039/100000001, name: National Science Foundation, award: MSV201514, EPS-1101284
- Language
- English
- Date published
- 03/15/2016
- Academic Unit
- Mechanical Engineering
- Record Identifier
- 9984196646502771
Metrics
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