Welding and Fatigue of Metallic Materials
A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Welding and Joining".
Deadline for manuscript submissions: 15 August 2025 | Viewed by 1461
Special Issue Editor
Interests: fatigue life; fatigue cracks; fracture mechanics; mechanical properties; microstructure; defects; residual stresses; crack closure
Special Issues, Collections and Topics in MDPI journals
Special Issue Information
Dear Colleagues,
The welding of metals is a technological process of joining metal parts, components, and structures that have already been widely used for many years. This technology makes it possible to melt materials together using high temperatures and allow them to cool, causing fusion. Though numerous welding technologies are already well known, new advanced methods like laser, electron beam, and others have been recently used. An advantage of welding is its relative easiness and possibility to be performed under different conditions from production assembly lines in factories and repairs in service to the joining of structural components in the field. A disadvantage of welding is that the welded area, typically consisting of a weld metal, fusion zone and heat-affected zone, is characterized by a substantially different microstructure, and different mechanical properties and fatigue resistance behavour in comparison with the original basic material. In addition, welds may contain crack-like or other types of defects, and the cooling process is usually associated with the occurrence of residual stresses. Though residual stresses represent local static prestress and do not affect the stress amplitude, they affect fatigue crack closure, playing an important role in crack-like weld defects.
Welded metal components and structures are often subjected to cyclic fatigue loading. When the fatigue stress amplitude exceeds the overall damage threshold, the damage process occurs. The fatigue damage mechanism is quite complicated and typically has three phases – crack initiation, crack growth, and final failure. Fatigue crack initiation is a local process that occurs in the weakest area of components or structures. Welds, sometimes called structural notches, represent one of such weak areas. For the mentioned reasons, understanding the fatigue resistance of welds to fatigue loading and evaluation of residual life are essential requirements, along with extensive testing. Articles from the mentioned field, but not limited to it, are welcome for this Special Issue.
Dr. Ivo Černý
Guest Editor
Manuscript Submission Information
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Keywords
- welding
- metallic materials
- microstructure
- fatigue resistance
- crack initiation
- residual stresses
- weld defects
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