Microstructure and mechanical properties of mild steel joints prepared by a flat friction stir spot welding technique

Yangshan, Sun; Fujii, Hidetoshi; Takaki, Naoki; Okitsu, Yoshitaka

doi:10.1016/j.matdes.2012.01.027

Cited by 65 publications

(38 citation statements)

References 20 publications

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“…Under friction heat and stirring, SZ presented fine equiaxed grains due to recrystallisation [15,18,19,31]. Sizes of grains in SZ increased with the increase of rotation speed [31].…”

Section: Microstructure Of Fssw Jointsmentioning

confidence: 99%

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Friction Stir Spot Welding: A Review on Joint Macro- and Microstructure, Property, and Process Modelling

Yang

Tian

2014

Advances in Materials Science and Engineering

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Friction stir spot welding (FSSW) is a very useful variant of the conventional friction stir welding (FSW), which shows great potential to be a replacement of single-point joining processes like resistance spot welding and riveting. There have been many reports and some industrial applications about FSSW. Based on the open literatures, the process features and variants, macro- and microstructural characteristics, and mechanical properties of the resultant joints and numerical simulations of the FSSW process were summarized. In addition, some applications of FSSW in aerospace, aviation, and automobile industries were also reviewed. Finally, the current problems and issues that existed in FSSW were indicated.

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“…Under friction heat and stirring, SZ presented fine equiaxed grains due to recrystallisation [15,18,19,31]. Sizes of grains in SZ increased with the increase of rotation speed [31].…”

Section: Microstructure Of Fssw Jointsmentioning

confidence: 99%

“…To obtain a weld joint without a keyhole, Sun et al [15][16][17] used a new FSSW technique. This process includes two steps ( Figure 5), in the first step, a specially designed backplate containing a round dent is used for conventional FSSW.…”

Section: The Other New Fssw Processmentioning

confidence: 99%

Friction Stir Spot Welding: A Review on Joint Macro- and Microstructure, Property, and Process Modelling

Yang

Tian

2014

Advances in Materials Science and Engineering

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“…It is insoluble in water, but soluble in a mixture Figure 1. Microstructure of mild steel-courtesy Sun et al [9].…”

Section: Materials Preparationmentioning

confidence: 99%

A Potential Corrosion Inhibitor for Acid Corrosion of Mild Steel

Osarolube¹

2017

MSA

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Abstract1-Phenyl-3-methylpyrazol-5-one (HPMP) was evaluated as corrosion inhibitor for mild steel in hydrochloric, nitric and perchloric acid solutions, using weight loss measurements at room temperature. HPMP was found to retard the corrosion rate of mild steel in hydrochloric and nitric acid solutions, while it aided the corrosion of same metal in perchloric acid solution. Corrosion rate decreased linearly with degree of surface coverage, and higher values of half-life were obtained for the coupons coated with HPMP inhibitor. The thicker the film of the HPMP coating on the metal, the more protection it gave to it, giving rise to the increase in inhibition efficiency.

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“…FSSW exhibits key advantages such as excellent mechanical properties, a low distortion, ease of handling, low cost, and clean working environment. [6][7][8] The FSSW technique has been successfully used to spot weld aluminum 9 , magnesium 10 , steel 11 and plastics. 12 Both similar and dissimilar spot welds were reported in the literature 13,14 .…”

Section: Introductionmentioning

confidence: 99%

Influence of the tool rotational speed on the microstructure and joint strength of friction-stir spot-welded pure copper

Dinaharan¹,

Akinlabi²

2016

Mater. Tehnol.

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Copper is very difficult to be spot welded with conventional fusion-welding techniques due to a high thermal diffusivity. Friction-stir spot welding (FSSW) is a novel solid-state welding process, suitable and effective for spot welding copper. Commercially pure copper sheets of 3 mm thickness were spot welded using an industrial friction-stir welding machine. The spot welds were made by varying the tool rotational speed at three levels. The spot welds were characterized using light microscopy. The shear-fracture load was evaluated using a computerized tensile-testing machine. The results revealed that the tool rotational speed remarkably influenced the microstructure, the shear-fracture load and the mode of fracture. Keywords: copper, friction-stir spot welding, microstructure, shear load Zaradi velike toplotne prevodnosti se baker zelo te`ko to~kasto vari pri obi~ajnih postopkih varjenja z zlivanjem. Torno vrtilno to~kasto varjenje (FSSW) je nov na~in varjenja v trdnem stanju, ki je primerno in primerljivo s torno vrtilnim to~kastim varjenjem bakra. Bakrene plo~evine, debeline 3 mm, iz~istega komercialno dostopnega bakra, so bile to~kasto zvarjene s torno vrtilnim to~kastim varjenjem, z uporabo industrijske naprave za tovrstno varjenje. To~kasti zvari so bili izdelani pri treh hitrostih vrtenja orodja. Karakterizirani so bili z uporabo svetlobne mikroskopije. Stri`na trdnost je bila ocenjena z uporabo ra~unalni{ko vodenega nateznega stroja. Rezultati so pokazali, da hitrost vrtenja orodja mo~no vpliva na mikrostrukturo, stri`no trdnost in na~in preloma. Klju~ne besede: baker, torno vrtilno to~kasto varjenje, mikrostruktura, stri`na obremenitev

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Microstructure and mechanical properties of mild steel joints prepared by a flat friction stir spot welding technique

Cited by 65 publications

References 20 publications

Friction Stir Spot Welding: A Review on Joint Macro- and Microstructure, Property, and Process Modelling

Friction Stir Spot Welding: A Review on Joint Macro- and Microstructure, Property, and Process Modelling

A Potential Corrosion Inhibitor for Acid Corrosion of Mild Steel

Influence of the tool rotational speed on the microstructure and joint strength of friction-stir spot-welded pure copper

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