Microstructure and mechanical properties of joints depending on the process used
Authors:
- Dawid Stanisz,
- Tomasz Machniewicz,
- Sławomir Parzych,
- Grzegorz Jeż,
- Leonid Dvorkin,
- Marek Hebda
Abstract
Today, numerous design solutions require joining thin-walled sheets or profiles as the traditional methods of welding with a consumable electrode in gas shielding, most often used in production processes, do not work well. The reason for this is that a large amount of heat is supplied to the joint, causing numerous welding deformations, defects, and incompatibilities. Moreover, the visual aspect of the connections made more and more often plays an equally crucial role. Therefore, it is important to look for solutions and compare different joining processes in order to achieve production criteria. The paper compares the properties of a 1.5 mm thick steel sheet joined by the manual and robotic MAG 135 and 138 welding process, manual and robotic laser welding, CMT welding with the use of solid or flux-cored wire, and butt welding. The macro- and microstructure, as well as the microhardness distribution of individual regions of the joints, were analyzed depending on the type of joining technology used. Furthermore, the mechanical properties of individual zones of joints were investigated with the use of a digital image correlation system. On the basis of the obtained test results, it was found that the joints made by the processes of manual laser welding and butt welding were characterized by a very regular weld shape, the smallest joint width, and greater grain refinement compared to other analyzed processes. Moreover, this method was characterized by the narrowest zone of hardness increase, only 3 mm, compared to, e.g., a joint made in the process of robotic welding CMT, for which this zone was more than twice as wide. Furthermore, the heataffected zone for the joints made in this way, in relation to the welds produced by the MAG 135/138 method, was, respectively, 2 and 2.7 times smaller.
- Record ID
- CUT5f50730e9ad4483a86cfa9e01af1264a
- Publication categories
- ;
- Author
- Journal series
- Materials, ISSN , e-ISSN 1996-1944, Biweekly
- Issue year
- 2022
- Vol
- 15
- No
- 15
- Pages
- [1-17]
- Article number
- 5171
- Other elements of collation
- il. (w tym kolor.); Bibliografia (na s.) - 15-17; Bibliografia (liczba pozycji) - 36; Oznaczenie streszczenia - Abstr.; Numeracja w czasopiśmie - Vol. 15, Iss. 15
- Substantive notes
- Topic: Modern Technologies and Manufacturing Systems, 2nd Volume
- Keywords in English
- arc welding MIG/MAG, laser welding, Cold Metal Transfer, joining thin-walled steel materials, robotic welding, butt welding
- ASJC Classification
- DOI
- DOI:10.3390/ma15155171 Opening in a new tab
- URL
- https://www.mdpi.com/1996-1944/15/15/5171 Opening in a new tab
- Related project
- E-mobilność oraz zrównoważone materiały i technologie. . Project leader at PK: , ,
- Language
- eng (en) English
- License
- Score (nominal)
- 140
- Score source
- journalList
- Score
- Publication indicators
- Additional fields
- Indeksowana w: Web of Science, Scopus
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUT5f50730e9ad4483a86cfa9e01af1264a/
- URN
urn:pkr-prod:CUT5f50730e9ad4483a86cfa9e01af1264a
* presented citation count is obtained through Internet information analysis, and it is close to the number calculated by the Publish or PerishOpening in a new tab system.