Microstructure and Mechanical Properties of Welding Joints

A special issue of Crystals (ISSN 2073-4352). This special issue belongs to the section "Inorganic Crystalline Materials".

Deadline for manuscript submissions: closed (20 April 2024) | Viewed by 706

Special Issue Editors


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Guest Editor
School of Materials Science and Technology, Harbin Institute of Technology at Weihai, Weihai 264209, China
Interests: biocompatibility; biomaterials; manufacturing of implantable components; wettability of alloys/ceramics; laser processing
Special Issues, Collections and Topics in MDPI journals

E-Mail Website
Guest Editor
School of Materials Science and Technology, Harbin Institute of Technology at Weihai, Weihai 264209, China
Interests: additive manufacturing; laser welding; nano-manufacturing; alloys and its composites; shape memory alloys
Special Issues, Collections and Topics in MDPI journals
State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China
Interests: welding; additive manufacturing

Special Issue Information

Dear Colleagues,

Welding is the basic method employed to manufacture complex structures. The relationship between the welding process and microstructures has been discussed for many years regarding the enhancement of joint properties.

In recent decades, novel welding methods and materials have been applied in order to modify the microstructure of joints, enhance their mechanical properties, and enable joints to be applied in harsher working environments. For example, laser shock peening is employed to eliminate the surface residual tensile stress of joints; high-energy beam connections between the engine combustion chamber fascia and skin are utilized to realize the assembly of additively manufactured parts; the biocompatibility of structures such as hip joints is enhanced via the fabrication of parts from a combination of titanium alloys and ceramics; and electric components are created via personalized and rapid nano-manufacturing.

Therefore, this Special Issue will include (but is not limited to) research on the welding of metals, ceramics, and composite materials, as well as the post-treatment of related parts. Attention should also be paid to the relationship between materials, structure, and mechanical performance.

Dr. Hong Bian
Dr. Danyang Lin
Dr. Xiaoyu Cai
Guest Editors

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Keywords

  • microstructure characterization
  • process optimization
  • mechanical properties
  • laser welding
  • friction stir welding
  • brazing
  • finite element simulation
  • electron beam welding
  • ultrasonic welding
  • hybrid welding
  • metallurgical bond
  • advanced materials

Published Papers (1 paper)

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Research

18 pages, 9295 KiB  
Article
Investigation on Friction Stir Welding Parameters: Mechanical Properties, Correlations and Corrosion Behaviors of Aluminum/Titanium Dissimilar Welds
by Amlan Kar, Sribalaji Mathiyalagan, Sergey Malopheyev, Rustam Kaibyshev, Satyam Suwas and Satish V. Kailas
Crystals 2024, 14(4), 305; https://0-doi-org.brum.beds.ac.uk/10.3390/cryst14040305 - 26 Mar 2024
Viewed by 559
Abstract
In industrial applications, welding of dissimilar metals such as aluminum (Al) and titanium (Ti) is a prerequisite for the development of hybrid components with improved mechanical and corrosion properties. However, dissimilar welding of the Al/Ti system is highly challenging due to differences in [...] Read more.
In industrial applications, welding of dissimilar metals such as aluminum (Al) and titanium (Ti) is a prerequisite for the development of hybrid components with improved mechanical and corrosion properties. However, dissimilar welding of the Al/Ti system is highly challenging due to differences in the physical and thermal properties of the two materials. In the present investigation, an attempt has been made to fabricate a dissimilar friction stir weld (FSW) of commercially pure Al and Ti and to elucidate the mechanism associated with superior joint formation. The process parameters, such as tool rotation speed, traverse speed and tool offset position have been optimized using Taguchi’s optimization technique. A detailed investigation of the weld with optimum process parameters has been carried out to reveal the mechanism of joint formation. The superior mechanical properties (24% higher ultimate tensile strength and 10% higher ductility than that of base Al) of the weld are attributed to the fabrication of a defect-free joint, formation of intercalated particles and an Al/Ti interlocking interface, homogeneous distribution of fine second-phase (Ti and/or intermetallics) particles in the weld nugget, reduction in the evolution of brittle Al3Ti intermetallic compounds (IMCs) and recrystallization and grain refinement of Al in the weld nugget. The potentio-dynamic polarization test indicated that the optimized Al/Ti weld has ~47% higher corrosion resistance than Al; it had a very mild corrosion attack due to the homogeneous dispersion of fine particles. The method and mechanism could have an immense influence on any dissimilar weld and metal matrix composites, improving their mechanical properties and corrosion resistance. Full article
(This article belongs to the Special Issue Microstructure and Mechanical Properties of Welding Joints)
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