Quantitative characterization on fatigue fracture features of A6005 aluminum alloy welded joints

AbstractThe main aim of this investigation is to produce a welding joint of higher strength than that of base metals. Composite welded joints were produced by friction stir welding process. 6061 aluminum alloy was used as a base metal and alumina particles added to welding zone to form metal matrix composites. The volume fraction of alumina particles incorporated in this study were 2, 4, 6, 8 and 10 vol% were added on both sides of welding line. Also, the alumina particles were pre-mixed with magnesium particles prior being added to the welding zone. Magnesium particles were used to enhance the bonding between the alumina particles and the matrix of 6061 aluminum alloy. Friction stir welded joints containing alumina particles were successfully obtained and it was observed that the strength of these joints was better than that of base metal. Experimental results showed that incorporating volume fraction of alumina particles up to 6 vol% into the welding zone led to higher strength of the composite welded joints as compared to plain welded joints.

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Void damage evolution of LF6 aluminum alloy welded joints under external load and thermal cycling conditions

Transactions of Nonferrous Metals Society of China ◽

10.1016/s1003-6326(09)60403-9 ◽

2010 ◽

Vol 20 (10) ◽

pp. 1968-1973 ◽

Cited By ~ 2

Author(s):

Guo-fa MI ◽

Da-wei ZHAO ◽

Cui-fen DONG ◽

Ji-tai NIU ◽

Cheng JIN

Keyword(s):

Aluminum Alloy ◽

Thermal Cycling ◽

Welded Joints ◽

External Load ◽

Damage Evolution ◽

Void Damage

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Influence of Stress Concentration on Fatigue Property of Welded Joints of 5083 Aluminum Alloy

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.456.451 ◽

2013 ◽

Vol 456 ◽

pp. 451-455

Author(s):

Jun Yang ◽

Bo Li ◽

Qiang Jia ◽

Yuan Xing Li ◽

Ming Yue Zhang ◽

...

Keyword(s):

Tensile Strength ◽

Aluminum Alloy ◽

Fatigue Strength ◽

Stress Concentration ◽

Welded Joints ◽

Weld Zone ◽

Fatigue Property ◽

Concentration Coefficient ◽

5083 Aluminum Alloy ◽

Stress Concentration Coefficient

Fatigue test of the welded joint of 5083 aluminum alloy with smooth and height of specimen and the weld zone than the high test measurement and theoretical stress concentration coefficient calculation, the weld reinforcement effect of stress concentration on the fatigue performance of welded joints. The results show that: Smooth tensile strength of specimens for 264MPa, fatigue strength is 95MPa, the tensile strength of the 36%. Higher tensile strength of specimens for 320MPa, fatigue strength is 70MPa, the tensile strength of the 22%. Higher specimen stress concentration coefficient is 1.64, the stress concentration to the weld toe becomes fatigue initiation source, and reduces the fatigue strength and the fatigue life of welded joints.

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Statistical Tensile Strength Characteristics of Aluminum Alloy Pipe and Steel Pipe Friction Welded Joints

Materials Science Forum ◽

10.4028/www.scientific.net/msf.331-337.1731 ◽

2000 ◽

Vol 331-337 ◽

pp. 1731-1736

Author(s):

Gosaku Kawai ◽

Koichi Ogawa ◽

Ryoji Tsujino ◽

Hiroshi Yamaguchi ◽

Hiroshi Tokisue

Keyword(s):

Tensile Strength ◽

Aluminum Alloy ◽

Welded Joints ◽

Strength Characteristics ◽

Steel Pipe

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Prediction of the Diagrams of Fatigue Fracture of D16T Aluminum Alloy by the Methods of Machine Learning

Materials Science ◽

10.1007/s11003-018-0189-9 ◽

2018 ◽

Vol 54 (3) ◽

pp. 333-338 ◽

Cited By ~ 2

Author(s):

О. P. Yasnii ◽

O. А. Pastukh ◽

Yu. І. Pyndus ◽

N. S. Lutsyk ◽

I. S. Didych

Keyword(s):

Machine Learning ◽

Aluminum Alloy ◽

Fatigue Fracture

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Effects of Pre-Tensile Deformation on the Fatigue Fracture Behavior of Annealed 7005 Aluminum Alloy Plate

Materials ◽

10.3390/ma15020623 ◽

2022 ◽

Vol 15 (2) ◽

pp. 623

Author(s):

Ni Tian ◽

Zhen Feng ◽

Xu Shi ◽

Wenze Wang ◽

Kun Liu ◽

...

Keyword(s):

Aluminum Alloy ◽

Fatigue Life ◽

Fatigue Fracture ◽

Tensile Deformation ◽

Thin Strip ◽

Second Phase ◽

Alloy Matrix ◽

Alloy Plate ◽

Dislocation Distribution ◽

Aluminum Alloy Plate

In the present study, the fatigue life and fatigue fracture characteristics of annealed 7005 aluminum alloy plates subjected to different pre-tensile deformations were investigated. The results obtained upon increasing the pre-tensile deformation of the alloy plate to 20% revealed that the second-phase particles did not show any obvious changes, and that the thickness of the thin strip grain slightly decreased. The dislocation distribution in the alloy matrix varied significantly among the grains or within each grain as the dislocation density gradually increased with increasing pre-tensile deformation. Moreover, the fatigue performance of the annealed 7005 aluminum alloy plate was significantly improved by the pre-tensile deformation, and the alloy plate subjected to 20% pre-tensile deformation exhibited an optimal fatigue life of ~1.06 × 106 cycles, which was 5.7 times and 5.3 times that of the undeformed and 3% pre-stretched alloy plates, respectively. Two fatigue life plateaus were observed in the pre-tensile deformation ranges of 3–5% and 8–12%, which corresponded to heterogeneous dislocation distribution among various grains and within each grain, respectively. Moreover, two large leaps in the plot of the fatigue-life–pre-tensile-deformation curve were observed, corresponding to the pre-tensile deformation ranges of 5–8% and 16–20%, respectively.

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