Fatigue of Welded Magnesium Alloy Joints

Tsujikawa, Masato; Somekawa, Hidetoshi; Higashi, Kenji; Iwasaki, Hayato; Hasegawa, Takeshi; Mizuta, Akiyoshi

doi:10.2320/matertrans.45.419

Cited by 32 publications

(8 citation statements)

References 13 publications

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“…Similar results were found with various aluminum alloys including 6013, 2014 and 7475 [50,51]. It is noted that other factors also affect sample fatigue life, especially any residual stress, the microstructure, and presence of defects which must also be accounted for when making fatigue life comparisons [53,54].…”

Section: Fatiguesupporting

confidence: 77%

Investigation of Nondestructive Testing Methods for Friction Stir Welding

Taheri

Kilpatrick

Norvalls

et al. 2019

Metals

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Friction stir welding is a method of materials processing that enables the joining of similar and dissimilar materials. The process, as originally designed by The Welding Institute (TWI), provides a unique approach to manufacturing—where materials can be joined in many designs and still retain mechanical properties that are similar to, or greater than, other forms of welding. This process is not free of defects that can alter, limit, and occasionally render the resulting weld unusable. Most common amongst these defects are kissing bonds, wormholes and cracks that are often hidden from visual inspection. To identify these defects, various nondestructive testing methods are being used. This paper presents background to the process of friction stir welding and identifies major process parameters that affect the weld properties, the origin, and types of defects that can occur, and potential nondestructive methods for ex-situ detection and in-situ identification of these potential defects, which can then allow for corrective action to be taken.

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Section: Fatiguesupporting

confidence: 77%

Investigation of Nondestructive Testing Methods for Friction Stir Welding

Taheri

Kilpatrick

Norvalls

et al. 2019

Metals

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“…Its specific strength is 175-223 MPa/(g/cm 3 ). These values easily exceed the value 125 of heat treated aluminum alloy A6061-T6, and 150 of conventional magnesium alloy extruded AZ31 (Mg-3 mass%Zn-1 mass%Al alloy), 4) and heat treated aluminum alloy A6061 5) and are almost comparable to the value 235 MPa/(g/cm 3 ) of heat-treated strong aluminum alloy A7075-T6. 6) It is now near at hand that the alloy will be put to practical use.…”

Section: Introductionmentioning

confidence: 90%

Cold-Rolled Mg-14 mass%Li-1 mass%Al Alloy and Its Friction Stir Welding

et al. 2006

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The feasibility of friction stir welding (FSW) for cold worked Mg-14 mass%Li-1 mass%Al alloy was investigated. The alloy melted and cast into ingots under pressurized argon gas atmosphere. Slabs prepared from homogenized ingots, then cold-rolled up to 0.5 mm thickness. The density of this alloy is 1.326 g/cm 3 and its ultimate tensile strength is from 180 to 294 MPa according to the reduction ratio of rolling. The cold rolled plates of 2 mm thickness were butted and jointed by FSW with various tool rotation and traveling speeds. It was found that the sound joints can be made at specific conditions apart from that of AZ31 alloy. Measurement of cross sectional hardness profile revealed slight higher hardness of stir zone than that of work-hardened base metal. The hcp peaks clearly appeared at XRD profiles from stir zones.

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“…[5][6][7] Many researchers have investigated the fatigue behavior of wrought magnesium alloys. [8][9][10][11][12][13][14][15][16][17][18][19] The reports show the crack initiation and/or propagation mechanisms [9][10][11][12] and the effect of microstructures such as grain size 12,13) and texture 14,15) on fatigue strength. Fatigue property is often evaluated with a stress ratio of R ¼ 0:1 or À1 during the cyclic-uniaxial test.…”

Section: Introductionmentioning

confidence: 99%

Fatigue Behaviors and Microstructures in an Extruded Mg-Al-Zn Alloy

et al. 2008

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Tensile, compression and fatigue tests were carried out on a commercially extruded Mg-Al-Zn alloy having an average grain size of about 15 mm. The tensile and compression tests at room temperature showed that the yield strength in tension was much higher than that in compression. The lower yield strength in compression resulted from its texture. The effects of the mechanical anisotropy on the fatigue behavior and its deformed microstructure were also investigated under a stress ratio of R ¼ 0:1 and À1. The fatigue strength, stress amplitude, at N ¼ 10 7 cycles under R ¼ À1 and 0.1 was about 120 and 90 MPa, respectively. The mechanical properties and the deformed microstructure observations indicated that the formation of deformation twins was related to the between maximum stress and the yield strength in tension and compression: the deformation twins were formed in the sample (maximum stress is higher than the yield strength) and showed no deformation twins in the sample (maximum stress is lower than the yield strength).

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Fatigue of Welded Magnesium Alloy Joints

Cited by 32 publications

References 13 publications

Investigation of Nondestructive Testing Methods for Friction Stir Welding

Investigation of Nondestructive Testing Methods for Friction Stir Welding

Cold-Rolled Mg-14 mass%Li-1 mass%Al Alloy and Its Friction Stir Welding

Fatigue Behaviors and Microstructures in an Extruded Mg-Al-Zn Alloy

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