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Analysis and prevention of weld crater cracking in circumferential laser microwelding of automotive pressure sensors
ID Kenda, Miha (Author), ID Klobčar, Damjan (Author), ID Nagode, Aleš (Author), ID Bračun, Drago (Author)

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Abstract
An analysis presents a weld leakage problems of automotive pressure sensor, caused by weld crater cracking. A two-beam laser welding (TBLW) was used to weld a circumferential weld, which undesirably increases the probability of weld leakage by creating two weld end craters on a single weld. Microstructural analysis showed that microsegregation of alloying elements combined with imposed strains causes solidification cracking at the weld end crater. A novel "zigzag" laser power ramp-down was used and the results showed a limited crack propagation by producing significantly shorter discontinuous cracks. In such weld crater endings the leakage is no longer an issue.

Language:English
Keywords:two-beam laser welding, continuous-wave, solidification cracking, weld termination regime, ramp-down, lap joint, 17–4 PH steel, Inconel 602
Work type:Article
Typology:1.01 - Original Scientific Article
Organization:FS - Faculty of Mechanical Engineering
NTF - Faculty of Natural Sciences and Engineering
Publication status:Published
Publication version:Version of Record
Year:2021
Number of pages:14 str.
Numbering:Vol. 128, art. 105579
PID:20.500.12556/RUL-128354 This link opens in a new window
UDC:621.791.725
ISSN on article:1350-6307
DOI:10.1016/j.engfailanal.2021.105579 This link opens in a new window
COBISS.SI-ID:69793539 This link opens in a new window
Publication date in RUL:09.07.2021
Views:759
Downloads:172
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Record is a part of a journal

Title:Engineering failure analysis
Shortened title:Eng fail. anal.
Publisher:Elsevier
ISSN:1350-6307
COBISS.SI-ID:15354117 This link opens in a new window

Licences

License:CC BY 4.0, Creative Commons Attribution 4.0 International
Link:http://creativecommons.org/licenses/by/4.0/
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.

Secondary language

Language:Slovenian
Keywords:lasersko varjenje z dvojnim žarkom, kontinuirno varjenje, razpoke v vročem, zaključevanje laserskih zvarov, zaključna rampa, prekrovni spoj, 17-4 PH, Inconel 602

Projects

Funder:Other - Other funder or multiple funders
Funding programme:Hidria Holding d.o.o.

Funder:ARRS - Slovenian Research Agency
Project number:P2-0270
Name:Proizvodni sistemi, laserske tehnologije in spajanje materialov

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