[Kovove materialy - Metallic materials]
    Sun - April 02, 2023 - 05:54 No. of hits : 1438809 ISSN 1338-4252 (online) ISSN 0023-432X (printed)
© Institute of Materials and Machine Mechanics, Slovak Academy of Sciences, Bratislava, Slovak Republic

VOLUME 59 (2021), Issue 6

Influence of shielding gases on porosity during laser welding of AZ31B magnesium alloy
vol. 59 (2021), no. 6, pp. 401 - 414
DOI: 10.4149/km_2021_6_401

The paper deals with the evaluation of the shielding gases influence on the porosity of AZ31B magnesium alloy weld joints produced with disk laser. Butt weld joints were produced under different shielding gas types, namely Ar 4.6, He 4.6, Ar + 5 vol.% He, Ar + 30 vol.% He. Light and electron microscopy, computed tomography, microhardness measurements and tensile testing were used for evaluation of weld joints properties. He shielded weld joints were the narrowest ones (1.79 mm). On the other hand, Ar shielded weld joints exhibited the largest weld width (2.11 mm). The choice of shielding gas had significant influence on the porosity level of welds. The lowest porosity was observed in weld joint produced in Ar 4.6 shielding atmosphere (only 0.05 mm3), while the highest level of porosity was detected in weld joint produced in pure He 4.6 (0.41 mm3).

Key words
laser welding, AZ31B magnesium alloy, AZ61 filler wire, porosity

[open article.pdf] Full text (1658 KB)

[IMMS SAS]      UMMS SAV - Bratislava (SK) Personal data Protection   ver. 1.7.5      [go to HOME PAGE]
Full title of this journal is bilingual: Kovové materiály - Metallic Materials.
The official abbreviation in accordance with JCR ISI is Kovove Mater.

Article abstracts updated: 2023-01-25 08:13      
Articles in press revised: 2023-03-31 09:42     
Full text pdf uploaded: 2022-04-21 16:28    
Information updated: 2020-06-29 17:09   
Code last revised: 2020-06-29 16:48  

© OldSoft, 2004, …, 2023