Influence of rotation speed on mechanical properties and corrosion sensitivity of friction stir welded AA2024‐T3 joints

Li, Na; Li, Wenya; Xu, Yaxin; Yang, Xiawei; Alexopoulos, Nikolaos D.

doi:10.1002/maco.201709960

Cited by 14 publications

(9 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although good intermixing was obtained at 1400 rpm, the tensile strength began to decrease after 1100 rpm due to prolonged thermal exposure causing softening at HAZ. The tensile strength results of the present findings were also similar to those investigated by Li et al 36 and Liu et al 37 From the tensile test, it was clear that a joint made at a very high traverse speed without any defect failed at SZ (Figure 2(c)) due to lower intermixing between two dissimilar base materials. Therefore, to achieve higher tensile strength in FSWed dissimilar aluminium alloys, rotational speed also needs to be varied for proper intermixing in the SZ.…”

Section: Mechanical Propertiessupporting

confidence: 90%

Effect of friction stir welding parameters on the material flow, mechanical properties and corrosion behavior of dissimilar AA5083-AA6061 joints

Kumar

Satyanarayana

2021

Proceedings of the Institution of Mechanical Engineers, Part C:

View full text Add to dashboard Cite

Material flow has a significant impact on the joint properties and is one of the most challenging aspects to be understood in dissimilar friction stir welding. The present study emphasizes the role of process parameters on material flow, mechanical properties and corrosion behavior of dissimilar friction stir welds of AA5083-AA6061. Microstructural analysis revealed that the onion ring sub-layer width observed at the stir zone was substantially changed by varying process parameters. It was understood that the higher rotational speeds promote better intermixing and enhanced mechanical properties. The notch tensile strength values were in correlation with the intermixing of materials at the stir zone and the highest notch tensile strength value was obtained at 1400 rpm and 60 mm/min. A remarkable degree of material intermixing and fragmentation of intermetallics at higher rotational speeds resulted in better corrosion resistance.

show abstract

Section: Mechanical Propertiessupporting

confidence: 90%

Effect of friction stir welding parameters on the material flow, mechanical properties and corrosion behavior of dissimilar AA5083-AA6061 joints

Kumar

Satyanarayana

2021

Proceedings of the Institution of Mechanical Engineers, Part C:

View full text Add to dashboard Cite

show abstract

“…1 A sizable number of studies have been reported highlighting the effect of the rotational and traverse speed on the evolution of FS weld microstructure and its resultant influence on properties. [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] During the initial FSW study, Hashimoto et al 19 found that the tool travel and rotational speed affect the quality of joint and formation of the defect. The plunge depth was found to be important in void formation.…”

Section: Introductionmentioning

confidence: 99%

Understanding the effect of tool geometrical aspects on intensity of mixing and void formation in friction stir process

Malik

Kailas

2020

Proceedings of the Institution of Mechanical Engineers, Part C:

View full text Add to dashboard Cite

The reduction of agglomeration of particulate reinforcement in friction stir processing and elimination of joint line remnant in friction stir welding depends on stirring ability of friction stir tool. The magnitude of stirring is indicated by the intensity of material inter-mixing in tool interacted region. Present investigations analyse the influence of geometrical aspects of classical friction stir tool on the intensity of material intermixing, location of high stir regions and void formation during the steady-state phase of friction stir welding. The classical tool was chosen as its geometrical features undergo minimal wear in the harsher processing environment. Investigating material mixing using metallic inserts have their shortcomings due to different flow properties of insert/marker and parent material. Therefore, bi-colour plasticine configuration possessing primary colours was adopted to understand the level of intermixing. The hue attribute of the generated secondary colour was utilised to identify and quantify material mixing. Experimental results revealed that the pin diameter positively influenced mixing and negatively affected void formation. Shoulder size and pin taper angle aided in the closure of void with inferior mixing. The intensity of mixing enhances on selection of tools possessing a shoulder to pin diameter ratio of 2.5. Finite element simulation studies were conducted to understand the reasons for mixing under certain tooling conditions. Since material subjected to stirring is concentrated primarily on a portion of advancing side, components of shear strain, shear strain rates, shear stress and velocity were tracked for this portion of processed material during its interaction with tool pin for one complete rotation.

show abstract

“…Mechanical equipment inevitably suffers from the severe environment and service conditions, usually accompanied by high/low temperature, salt spray, and acid/alkaline atmosphere. The resulting friction, wear, and corrosion are the most prominent factors that affect the service life and cause the material failure, 1,2 even badly damage during the whole life cycle. So it is of great significance to take effective protection for weakening or eliminating these conditions.…”

Section: Introductionmentioning

confidence: 99%

Regulating performance characteristics of lithium complex greases via dibasic acids

Ren

et al. 2020

Lubrication Science

View full text Add to dashboard Cite

Thickener as an important ingredient affects the performance characteristics of lubricating grease. Here, seven lithium complex greases (LCGs) were prepared by saponification of 12‐OH stearic acid and low molecular weight dibasic acids (including adipic acid, sebacic acid, phthalic acid, dodecanedioic acid, and the combination of sebacic acid and phthalic acid in different molar ratios) with LiOH, using polyalphaolefin (PAO 40) as base oil. Physical properties and lubrication function of as‐prepared LCGs were evaluated in detail, and the friction mechanism was explored via analysis on the morphologies and composition of worn surfaces. Results illustrate that the saponification of mixed 12‐OH stearic acid and sebacic acid with LiOH provides good thickener for improving the physico‐chemical performance of LCG, while the thickener prepared by 12‐OH stearic acid and adipic acid with LiOH enhances lubrication function of LCG, mainly depending on synergy of grease film and tribo‐chemical reaction film.

show abstract

Influence of rotation speed on mechanical properties and corrosion sensitivity of friction stir welded AA2024‐T3 joints

Cited by 14 publications

References 33 publications

Effect of friction stir welding parameters on the material flow, mechanical properties and corrosion behavior of dissimilar AA5083-AA6061 joints

Effect of friction stir welding parameters on the material flow, mechanical properties and corrosion behavior of dissimilar AA5083-AA6061 joints

Understanding the effect of tool geometrical aspects on intensity of mixing and void formation in friction stir process

Regulating performance characteristics of lithium complex greases via dibasic acids

Contact Info

Product

Resources

About