High-strength wire + arc additive manufactured steel

High-strength 690-MPa steel was prepared using a wire + arc additive manufacturing (WAAM) technology. The phase composition, microstructure, and crystal structure of highstrength 690-MPa steel samples were analysed, and the results show that a sample prepared using WAAM technology achieves a good fo...

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Bibliographic Details
Published inInternational journal of materials research Vol. 111; no. 4; pp. 325 - 331
Main Authors Guo, Chun, Liu, Maoxue, Hu, Ruizhang, Yang, Tuoyu, Wei, Baoli, Chen, Feng, Zhang, Liyong
Format Journal Article
LanguageEnglish
Published Stuttgart De Gruyter 01.04.2020
Carl Hanser Verlag
Subjects
Acicular structure
Bainite
Crystal structure
Elongation
Ferrites
High strength
High strength steel
Impact strength
Mechanical properties
Microhardness
Microstructure
Phase composition
Properties
Tensile strength
Vertical distribution
Wire
Wire + arc additive manufacturing
Yield strength
Yield stress
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Summary:High-strength 690-MPa steel was prepared using a wire + arc additive manufacturing (WAAM) technology. The phase composition, microstructure, and crystal structure of highstrength 690-MPa steel samples were analysed, and the results show that a sample prepared using WAAM technology achieves a good formation quality. The metallographic structure was mainly acicular ferrite, massive ferrite, and granular bainite. The microhardness distribution of the vertical and horizontal sections of the samples is uniform. Excellent mechanical properties of the specimen were shown, including a horizontal yield strength of 536 MPa, a tensile strength of 760 MPa, an elongation of 23.5%, a Charpy impact value of 70 J at -508C, a vertical yield strength of 486 MPa, a tensile strength of 758 MPa, an elongation of 21.5%, and a Charpy impact value of 51 J at -508C.
ISSN:1862-5282
2195-8556
DOI:10.3139/146.111890