The Evaluation of Laser Weldability of the Third-Generation Advanced High Strength Steel

被引：7
作者：
Pereira, Antonio B. [1 ]
Santos, Rafael O. [1 ,2 ,3 ]
Carvalho, Bruno S. [1 ]
Butuc, Marilena C. [1 ]
Vincze, Gabriela [1 ]
Moreira, Luciano P. [3 ]
机构：
[1] Univ Aveiro, TEMA Ctr Mech Technol & Automat, Dept Mech Engn, P-3810193 Aveiro, Portugal
[2] Ctr Fed Educ Tecnol Celso Suckow da Fonseca CEFET, Dept Mech Engn, BR-23953030 Rio De Janeiro, Brazil
[3] Univ Fed Fluminense, Grad Program Met Engn, BR-27255125 Volta Redonda, Brazil
来源：
METALS | 2019年 / 9卷 / 10期
关键词：
Nd:YAG laser-welding; third generation of advanced high strength steel; tensile testing; microstructural analysis; micro-hardness test; MECHANICAL-PROPERTIES; RETAINED AUSTENITE; MICROSTRUCTURE; RESISTANCE; BEHAVIOR; AHSS; TRANSFORMATION; DEFORMATION; EVOLUTION; JOINTS;
D O I：
10.3390/met9101051
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
To meet the demands of vehicular safety and greenhouse gas emission reduction, the automotive industry is increasingly using advanced high strength steels (AHSS) in the production of the components. With the development of the new generation of AHSS, it is essential to study their behavior towards manufacturing processes used in the automotive industry. For this purpose, the welding capability of newly developed third-generation Gen3 980T steel was investigated using the Nd:YAG (Neodymium:Yittrium Aluminum Garnet) laser-welding with different parameter conditions. The analysis was made by uniaxial tensile tests, micro-hardness, Scanning Electron Microscopy (SEM) and X-Ray Diffraction (XRD). The criteria used to evaluate the quality of the weld were the distance between the fracture and the weld bead and the surface finish. A relationship between the quality of the weld and the energy density was observed, expressed by a partial penetration for values below the optimal, and by irregularities in the weld bead and a high number of spatters for the values above the optimal.
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页数：13
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