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Microstructure and Mechanical Properties of Laser Welded Joint of 6061-T4 Aluminum Alloy
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Miao WANG1, Tianjing LI1, Yida ZENG2, Mingliang LI1, Zhaoqing LIN1
Mining and Metallurgical Engineering | 2023, 43(1) : 141 - 144
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Mining and Metallurgical Engineering | 2023, 43(1): 141-144
• MATERIALS •
Microstructure and Mechanical Properties of Laser Welded Joint of 6061-T4 Aluminum Alloy
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Miao WANG1, Tianjing LI1, Yida ZENG2, Mingliang LI1, Zhaoqing LIN1
Affiliations
  • 1.School of Automobile and Transportation, Yancheng Vocational and Technical Institute of Industry, Yancheng 224002, Jiangsu, China
  • 2.School of Aeronautical Manufacturing Engineering, Nanchang Hangkong University, Nanchang 330063, Jiangxi, China
Published: 2023-02-01 doi: 10.3969/j.issn.0253-6099.2023.01.031
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After 6061-T4 aluminum alloy sheet for automobile was welded by laser welding, the microstructure, microhardness, strength and plasticity of welded joint, as well as fracture surface morphology of tensile specimen were studied by using metallographic microscope, transmission electron microscope, scanning electron microscope, Vickers hardness test and tensile test. The results show that the laser welded joint of 6061-T4 aluminum alloy has a coarse strip of grain structure in its base metal area, the weld seam has a structure of very fine as-cast dendrite in the center, acicular β″ precipitates segregate at grain boundary, and dislocation density decreases. It is found that both the strength (hardness) and plasticity of laser welded joint are lower than those of base metal.

6061 aluminum alloy  /  laser welding  /  welded joint  /  microstructure  /  mechanical properties  /  weld seam
Miao WANG, Tianjing LI, Yida ZENG, Mingliang LI, Zhaoqing LIN. Microstructure and Mechanical Properties of Laser Welded Joint of 6061-T4 Aluminum Alloy[J]. Mining and Metallurgical Engineering, 2023 , 43 (1) : 141 -144 . DOI: 10.3969/j.issn.0253-6099.2023.01.031
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Year 2023 volume 43 Issue 1
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doi: 10.3969/j.issn.0253-6099.2023.01.031
  • Receive Date：2022-07-23
  • Online Date：2026-03-05
  • Published：2023-02-01
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  • Received：2022-07-23
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Affiliations
    1.School of Automobile and Transportation, Yancheng Vocational and Technical Institute of Industry, Yancheng 224002, Jiangsu, China
    2.School of Aeronautical Manufacturing Engineering, Nanchang Hangkong University, Nanchang 330063, Jiangxi, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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