Tensile properties and fracture locations of friction-stir-welded joints of 2017-T351 aluminum alloy

Liu, Huijie; Fujii, Hidetoshi; Maeda, Masakatsu; Nogi, Kiyoshi

doi:10.1016/s0924-0136(03)00806-9

Cited by 442 publications

(245 citation statements)

References 12 publications

Supporting

Mentioning

227

Contrasting

Unclassified

Order By: Relevance

“…Microhardness measurements on the joint cross-section both of the as-welded and post-weld aged joints shows the typical hardness distribution of a heat treatable aluminum alloy after FSW 9,17 . The observed data dispersion agrees with what has been previously recorded in literature 5,10 .…”

Section: Discussionmentioning

confidence: 93%

“…So far, many studies have been carried out on FSWed joints after a heat treatment to assess the properties of the weld structure. In particular, in the 2xxx-series, the following alloys were friction stir welded to compare the mechanical properties of the joints in as-welded and postweld aged condition: 2219-O 15 , 2219-T87 16 , 2017-T351 17 , and 2024-T4 18 . It was found that the post-weld aged 2219-T87 FSWed joints showed superior fatigue performance compared to electron beam and gas tungsten arc welded joints.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Influence of welding parameters and post-weld aging on tensile properties and fracture location of AA2139-T351 friction-stir-welded joints

Prisco¹,

Squillace²,

Astarita³

et al. 2013

Mat. Res.

View full text Add to dashboard Cite

Tensile properties and fracture location of AA2139-T351 friction stir welded joints are studied in the as-welded and post-weld aged condition. The experimental results show that when the joints are free of welding defects, they fail on the advancing side of the HAZ exhibiting a large amount of plastic deformation. When the revolutionary pitch exceeds a threshold value, some micro-defects are formed in the weld nugget due to insufficient heat input. In this case, the joints fail near the weld center, and the fracture occurs in a mixed mode, both ductile and brittle. However, being less ductile, post-weld aged joints are less defect-tolerant and, then, they fracture closer to the weld center, showing a reduced elongation at fracture and an UTS within the order of magnitude of the as-welded joints.

show abstract

Section: Discussionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Influence of welding parameters and post-weld aging on tensile properties and fracture location of AA2139-T351 friction-stir-welded joints

Prisco¹,

Squillace²,

Astarita³

et al. 2013

Mat. Res.

View full text Add to dashboard Cite

show abstract

“…This should be attributed to the fact that the 10-joint has a large softening region width. During tensile test, the plastic deformation is primarily concentrated in the softening region [19,20]. Larger amount of grains of 10-joint are able to be involved in the plastic deformation during tensile test, which retards the occurrence of work hardening and thus leads to the good ductility.…”

Section: Joint Mechanical Behaviormentioning

confidence: 99%

Impact of shoulder concavity on non-tool-tilt friction stir welding of 5052 aluminum alloy

Zhang

Wang

Zhu

et al. 2018

Int J Adv Manuf Technol

View full text Add to dashboard Cite

In regard to the non-tool-tilt friction stir welding (NTT-FSW) process, the shoulder concavity has significant effects on the control of heat generation and material flow, and thus is an important geometrical feature for the tool design. In this paper, three types of shoulder concavity angles (SCAs), i.e., 0°, 5°, and 10°, were selected to explore the impact of SCA on the NTT-FSW of 5052 aluminum alloy. The results indicate that the increase of SCA lowers the tool axial force, reduces the nugget width, and weakens the band structure in the nugget. A weakening of shoulder thermal effect occurs from 0°to 5°SCA, leading to an improvement of the structure-property of the NTT-FSW joint. Further increasing the SCA to 10°causes the generation of the secondary sliding frictional heat at the interface between the shoulder-driven material and the base material, and thus the shoulder thermal effect does not show a continuous weakening trend as expected but becomes stronger instead, resulting in the deterioration of the microstructure evolution and the degradation of the tensile strength of NTT-FSW joint.

show abstract

“…Artificial aging was carried out at 165 °C for a soaking time of 18 h. The quenched joints were heated in the furnace from room temperature to 165 °C at a rate of 10 °C/min. After the soaking time, ©IJRASET (UGC Approved Journal): All Rights are Reserved the joints were slowly cooled in the furnace to room temperature and the whole PWHT process was completed [10]. PWHT of the prepared specimen was performed at chemical technology lab in SLIET, Longowal.…”

Section: B Post Weld Heat Treatmentmentioning

confidence: 99%

Effect of Post Weld Heat Treatment on Properties of ACTIG Welded Aa6063 Aluminium Alloy Joint

Verma¹

2017

IJRASET

View full text Add to dashboard Cite

AA6063 aluminium alloy joints were fabricated by alternating current tungsten inert gas (ACTIG) welding process and the effects of post weld heat treatment (PWHT) on the tensile properties, impact strength, microstructure, microhardness and fractography of the welded joints were investigated. The ACTIG welding process was adopted because it bears higher strength, more ductility and no apparent microstructure defect. The welded samples were divided into as-welded (AW) sample and PWHT sample. The PWHT method used on the samples was solution treatment (535 °C, 2h), water quenching and artificial aging (165 °C, 18h). The experimental results show that, compared with the AW samples, the microstructure characteristics and mechanical properties of the AA6063 joints after PWHT were significantly improved. The improvement of ultimate tensile strength, and impact strength are 3.72% and 22.22% respectively. Keywords: GTAW, PWHT, SEM, EDS. I.INTRODUCTION Aluminium alloys have been widely used in many fields such as the construction, transportation and aerospace owing to their excellent performance, including light weight, high strength and ductility, good corrosion resistance and abundant resources [1]. Among the various heat-treatable aluminium alloys, AA6063 aluminium alloys possess a good combination of strength and toughness with excellent weldability and extrudability, which makes this alloy an preferred choice for Automotive outer bodypanels, railcars, etc. buildings (doors, windows, ladder, etc), marine(offshore structure, etc), heating(brazing sheets, etc)]. This type of aluminium alloy contains Magnesium(Mg) and Silicon(Si) as its major alloying element. Welding is one of the most common joining methods for aluminium alloys. Tungsten inert gas (TIG) process and gas metal arc welding (GMAW) are the most-used welding processes [2]. GMAW possesses advantages of high deposition rate, high welding speed and deep penetration, but excessive heat input brings particularly in welding of thin aluminium sheets. Hence, TIG welding process is preferred over gas metal arc welding so as to obtain high quality weldments [3]. The TIG welding used in this work as AC tungsten inert gas (ACTIG). Moreover, the output of pulsed current can also strengthen the molten pool stirring to produce refined grains. In terms of weldability [6], AA6063 suffers from a substantial decline in strength after welding. The loss of strength is because the rapid melting and solidification process makes all the strengthening precipitates dissolve into the aluminium matrix and complete dissolution of the precipitates can not take place in weld metal and overaging appear in HAZ and meanwhile solute segregation and grain coarsening also come up [11]. Therefore, the post weld heat treatment (PWHT) can be implemented as an effective method of minimizing the softening and improving the properties of welded joints. PWHT has been demonstrated to be a practical option to regain the strength of the joints by modifying the size, shape and distribution of th...

show abstract

Tensile properties and fracture locations of friction-stir-welded joints of 2017-T351 aluminum alloy

Cited by 442 publications

References 12 publications

Influence of welding parameters and post-weld aging on tensile properties and fracture location of AA2139-T351 friction-stir-welded joints

Influence of welding parameters and post-weld aging on tensile properties and fracture location of AA2139-T351 friction-stir-welded joints

Impact of shoulder concavity on non-tool-tilt friction stir welding of 5052 aluminum alloy

Effect of Post Weld Heat Treatment on Properties of ACTIG Welded Aa6063 Aluminium Alloy Joint

Contact Info

Product

Resources

About