Microstructures and mechanical properties of dissimilar Nd:YAG laser weldments of AISI4340 and AISI316L steels

This paper presents studies on the microstructure and mechanical properties of AISI 316L stainless steel and AISI 4340 low-alloy steel joints formed by the Nd:YAG laser welding process. The weld microstructures and heat affected zones (HAZs) were investigated. Austenitic microstructures were observe...

Full description

Saved in:
Bibliographic Details
Published in:International journal of minerals, metallurgy and materials metallurgy and materials, 2017-05, Vol.24 (5), p.538-549
Main Authors: Sufizadeh, A. R., Akbari Mousavi, S. A. A.
Format: Article
Language:English
Subjects:
Austenitic stainless steels
Ceramics
Characterization and Evaluation of Materials
Chemical elements
Chemistry and Materials Science
Composites
Cooling
Cooling rate
Corrosion and Coatings
Glass
Hardness tests
Heat affected zone
Investigations
Laser beam welding
Lasers
Low alloy steels
Low carbon steel
Materials Science
Mechanical properties
Metallic Materials
Metallurgy
Metals
Microstructure
Natural Materials
Neodymium lasers
Scanning electron microscopy
Semiconductor lasers
Solidification
Stainless steel
Surfaces and Interfaces
Tensile properties
Tensile tests
Thin Films
Tribology
Weldments
YAG lasers
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This paper presents studies on the microstructure and mechanical properties of AISI 316L stainless steel and AISI 4340 low-alloy steel joints formed by the Nd:YAG laser welding process. The weld microstructures and heat affected zones (HAZs) were investigated. Austenitic microstructures were observed in all of the samples. The sizes of the HAZs changed when the heat input was varied, and the 316L sides exhibited a larger HAZ. The cooling rates were calculated by measuring the solidification dendrite arm spacing. It is shown that high cooling rates lead to an austenitic microstructure. Tensile tests were carried out, and the results revealed the tensile properties of both the base metals and the weldments. The hardness test results agreed well with the tensile test results.
ISSN:1674-4799
1869-103X
DOI:10.1007/s12613-017-1435-0