Pyramid-like spikes in a single crystal superalloy produced by picosecond laser irradiation

Wei Zhang; Xiangzhong Cui; Qiang Feng; Guanghua Cheng; Guojia Ma; Xiaobing Zhang

doi:10.1007/s00339-013-7968-9

Pyramid-like spikes in a single crystal superalloy produced by picosecond laser irradiation

Wei Zhang, Xiangzhong Cui, Qiang Feng, Guanghua Cheng, Guojia Ma, Xiaobing Zhang

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

Pyramid-like spikes in a single crystal superalloy were investigated upon irradiation with picosecond (ps) laser pulses (200 ps, 800 nm, 1 kHz) under different laser fluences and pulse numbers. Both sides and grooves of pyramid-like spikes were covered with ripples, which had a period of ∼760 nm. The pyramid-like spike separation increased obviously with increasing laser fluence. Microstructural investigations indicate that the pyramid-like spikeswere initiated with subsequent pulses from a smooth surface with corrugations and ripples. The coexistence of capillary waves for spikes and capillary waves for ripples in the melted material can be used to explain the formation of the pyramid-like spikes.

Original language	English
Pages (from-to)	373-377
Number of pages	5
Journal	Applied Physics A: Materials Science and Processing
Volume	113
Issue number	2
DOIs	https://doi.org/10.1007/s00339-013-7968-9
State	Published - Nov 2013
Externally published	Yes

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title = "Pyramid-like spikes in a single crystal superalloy produced by picosecond laser irradiation",

abstract = "Pyramid-like spikes in a single crystal superalloy were investigated upon irradiation with picosecond (ps) laser pulses (200 ps, 800 nm, 1 kHz) under different laser fluences and pulse numbers. Both sides and grooves of pyramid-like spikes were covered with ripples, which had a period of ∼760 nm. The pyramid-like spike separation increased obviously with increasing laser fluence. Microstructural investigations indicate that the pyramid-like spikeswere initiated with subsequent pulses from a smooth surface with corrugations and ripples. The coexistence of capillary waves for spikes and capillary waves for ripples in the melted material can be used to explain the formation of the pyramid-like spikes.",

author = "Wei Zhang and Xiangzhong Cui and Qiang Feng and Guanghua Cheng and Guojia Ma and Xiaobing Zhang",

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AU - Zhang, Wei

AU - Cui, Xiangzhong

AU - Feng, Qiang

AU - Cheng, Guanghua

AU - Ma, Guojia

AU - Zhang, Xiaobing

PY - 2013/11

Y1 - 2013/11

N2 - Pyramid-like spikes in a single crystal superalloy were investigated upon irradiation with picosecond (ps) laser pulses (200 ps, 800 nm, 1 kHz) under different laser fluences and pulse numbers. Both sides and grooves of pyramid-like spikes were covered with ripples, which had a period of ∼760 nm. The pyramid-like spike separation increased obviously with increasing laser fluence. Microstructural investigations indicate that the pyramid-like spikeswere initiated with subsequent pulses from a smooth surface with corrugations and ripples. The coexistence of capillary waves for spikes and capillary waves for ripples in the melted material can be used to explain the formation of the pyramid-like spikes.

AB - Pyramid-like spikes in a single crystal superalloy were investigated upon irradiation with picosecond (ps) laser pulses (200 ps, 800 nm, 1 kHz) under different laser fluences and pulse numbers. Both sides and grooves of pyramid-like spikes were covered with ripples, which had a period of ∼760 nm. The pyramid-like spike separation increased obviously with increasing laser fluence. Microstructural investigations indicate that the pyramid-like spikeswere initiated with subsequent pulses from a smooth surface with corrugations and ripples. The coexistence of capillary waves for spikes and capillary waves for ripples in the melted material can be used to explain the formation of the pyramid-like spikes.

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JO - Applied Physics A: Materials Science and Processing

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ER -

Pyramid-like spikes in a single crystal superalloy produced by picosecond laser irradiation

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