Evolution of local texture and its effect on mechanical properties and fracture behavior of friction stir welded joint of extruded Mg-3Al-1Zn alloy

The7A05 aluminum alloy of the 10mm thickness was welded by the friction stir welding. The microstructure and mechanical Properties of the welded joint was researched by the optical microscope, etc. The results showed: the microstructure of the weld nugget zone and the thermal mechanically affected zone were refined as the welding speed increasing when the rotate speed is constant. As the welding speed increasing the strength of extension of the welded joint is increasing at first and then stable basically. but the yield strength had no obvious change.

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A Partitioning Method for Friction Stir Welded Joint of AA2219 Based on Tensile Test

Metals ◽

10.3390/met10010065 ◽

2020 ◽

Vol 10 (1) ◽

pp. 65

Author(s):

Guanglong Cao ◽

Mingfa Ren ◽

Yahui Zhang ◽

Weibin Peng ◽

Tong Li

Keyword(s):

Mechanical Properties ◽

Tensile Test ◽

Welded Joint ◽

Classical Method ◽

Plastic Property ◽

Image Correlation ◽

Strain Hardening Exponent ◽

Friction Stir ◽

Detection Technology ◽

The Cost

The partition of aluminum alloy welded joint often depends on microscopic methods such as scanning electron microscopy before. This paper provides a novel partitioning method, which can obtain the material properties and partition results at the same time based on tensile test. The mechanical properties of every point on the whole welded joint are first obtained by the digital image correlation (DIC) method. Then, the mechanical property function of the weld joint along the weld center is established due to the changes of plastic property and strain hardening exponent at each point and the boundary between different areas is then determined. Metallographic detection technology and nano-mechanical testing techniques are employed to validate this partitioning scheme. The partition result of the strategy proposed in this paper is consistent with the partitioning result of the classical method. Compared to classical method, the proposed partitioning method is more practical and effective, as it can obtain mechanical properties and partition boundary through a single tensile test and reduce the cost of metallographic test.

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Mechanical Properties and Fracture Toughness of Aluminum Vessels by Friction Stir Welding

Fracture Methodologies and Manufacturing Processes ◽

10.1115/pvp2004-2296 ◽

2004 ◽

Author(s):

Masahito Mochizuki ◽

Masao Toyoda ◽

Masayuki Inuzuka ◽

Hidehito Nishida

Keyword(s):

Mechanical Properties ◽

Fracture Toughness ◽

Crack Initiation ◽

Base Metal ◽

Welded Joint ◽

Stir Zone ◽

Crack Initiation And Propagation ◽

Friction Stir ◽

Fine Grained ◽

Initiation And Propagation

Mechanical properties and fracture toughness in friction stir welded joint of vessels of structural aluminum alloy type A5083-O are investigated. Welded joint from 25 mm-thick plate is fabricated by one-side one-pass friction stir. Charpy impact energy and critical crack-tip opening displacement (CTOD) in friction stir weld are much higher than those of base metal or heat-affected zone, whereas mechanical properties such as stress-strain curve and Vickers hardness do not have a conspicuous difference. Effects of microstructure on crack initiation and propagation are studied in order to clarify the difference of fracture toughness between stir zone and base metal. Both tensile test and bending test show that the fine-grained microstructure in stir zone induces to increase ductile crack initiation and propagation resistance by analyzing fracture resistance curves and diameter of dimples in fracture surface. It is found that high fracture toughness value in stir zone is affected fine-grained microstructure by friction stirring.

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Effect of Post-welded Heat Treatment on the Microstructures and Mechanical Properties of Friction Stir Welded Joint of High-nitrogen Austenitic Stainless Steel

Journal of Mechanical Engineering ◽

10.3901/jme.2015.22.047 ◽

2015 ◽

Vol 51 (22) ◽

pp. 47

Author(s):

Yijun LI

Keyword(s):

Mechanical Properties ◽

Heat Treatment ◽

Stainless Steel ◽

Austenitic Stainless Steel ◽

Welded Joint ◽

High Nitrogen ◽

Friction Stir ◽

Microstructures And Mechanical Properties

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Microstructure and mechanical properties of friction stir welded joint of Zr55Cu30Al10Ni5 bulk metallic glass with pure copper

Materials Science and Engineering A ◽

10.1016/j.msea.2010.02.072 ◽

2010 ◽

Vol 527 (15) ◽

pp. 3427-3432 ◽

Cited By ~ 29

Author(s):

Yufeng Sun ◽

Youngsu Ji ◽

Hidetoshi Fujii ◽

Kazuhiro Nakata ◽

Kiyoshi Nogi

Keyword(s):

Mechanical Properties ◽

Metallic Glass ◽

Bulk Metallic Glass ◽

Welded Joint ◽

Pure Copper ◽

Friction Stir ◽

Microstructure And Mechanical Properties

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Experimental Study on Friction Stir Welding of Marine Grade Aluminum Alloy

Journal of Ship Production ◽

10.5957/jsp.2009.25.1.21 ◽

2009 ◽

Vol 25 (01) ◽

pp. 21-26

Author(s):

Pankaj Biswas ◽

N. R. Mandal

Keyword(s):

Mechanical Properties ◽

Aluminum Alloy ◽

Friction Stir Welding ◽

Welded Joint ◽

Traverse Speed ◽

Rotating Speed ◽

Friction Stir ◽

Weld Parameters ◽

5083 Aluminum Alloy ◽

Selection Of

Friction stir welding, a comparatively new joining technique, is mainly used for welding aluminum alloys. In the present work, an attempt has been made to study the effect of weld parameters of friction stir welding of marine grade 5083 aluminum alloy. Several test runs were conducted to assess the effects of tool rotating speed and tool traverse speed on the microstructure and mechanical properties of the welded joint. It was observed that the tool traverse speed has a significant effect on the end properties of the welded joint. Grain refinement was observed in the thermomechanically affected zone (TMAZ), which led to improved mechanical properties of the welded joint. However, an increase in welding speed keeping rotational speed constant led to deterioration of mechanical properties. The study strongly indicates a possibility of achieving a superior welded joint in marine grade 5083 aluminum alloy with adequate selection of process parameters.

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