Quantitative Analysis of Composition Change in AZ31 Magnesium Alloy Using CF-LIBS After Laser Material Processing

ZHU Dehua (朱德华); CAO Yu (曹宇); ZHONG Rong (钟蓉); CHEN Xiaojing (陈孝敬)

doi:10.1088/1009-0630/17/11/03

Plasma Science and Technology > 2015 > 17(11): 909-913. > DOI: 10.1088/1009-0630/17/11/03

ZHU Dehua (朱德华), CAO Yu (曹宇), ZHONG Rong (钟蓉), CHEN Xiaojing (陈孝敬). Quantitative Analysis of Composition Change in AZ31 Magnesium Alloy Using CF-LIBS After Laser Material Processing[J]. Plasma Science and Technology, 2015, 17(11): 909-913. DOI: 10.1088/1009-0630/17/11/03

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Quantitative Analysis of Composition Change in AZ31 Magnesium Alloy Using CF-LIBS After Laser Material Processing

1College of Mechanical & Electrical Engineering, Wenzhou University, Wenzhou 325035, China 2College of Physics & Electronic Information Engineering, Wenzhou University, Wenzhou 325035, China

Funds: supported by National Natural Science Foundation of China (Nos. 61405147, 51375348) and the Scientific Research Fund of Zhejiang Provincial Education Department, China (No. Y201430387)

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Received Date: March 22, 2015

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Abstract

Abstract

The concentration of elements in molten metal of AZ31 magnesium alloy after long pulsed Nd:YAG laser processing was quantitatively analyzed by using calibration-free laser-induced breakdown spectroscopy (CF-LIBS). The composition change in AZ31 magnesium alloy under different laser pulse width was also investigated. The experimental results showed that CF-LIBS can obtain satisfactory quantitative or semi-quantitative results for matrix or major elements, while only qualitative analysis was possible for minor or trace elements. Moreover, it is found that the chemical composition of molten metal will change after laser processing. The concentration of magnesium in molten metal is lower than that present in the base metal. The Mg loss increases with an increase of pulse width in the laser processing. This result shows that the selective vaporization of di?erent elements is a?ected by the pulse width during laser processing.
- laser processing,
- CF-LIBS,
- emission spectra,
- composition change,
- AZ31 magnesium alloy

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References

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