Corrosion resistance of friction stir welded 304 stainless steel

Park, Seung Hwan C.; Sato, Yutaka; Kokawa, Hiroyuki; Okamoto, K.; Hirano, Shinji; Inagaki, Masahisa

doi:10.1016/j.scriptamat.2004.04.001

Cited by 125 publications

(42 citation statements)

References 28 publications

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“…HAZ and the weld zone hardness are mainly higher that the base metal hardness (Mukhopadhyay et al, 2009). The observed hardness profiles are similar to the ones reported by (Park et al, 2004;Aslanlar, 2006). The microhardness of as-welded specimen has values a little higher than the microhardness of transition pure copper specimen.…”

Section: Hardness Profilesupporting

confidence: 86%

“…For several years ago, austenitic stainless steel 304L have been employed in industrial applications such as pipes and pressure vessels for structural purposes. The influences austenitic stainless steel 304L on the industry are mainly due to its mechanical strength as well as excellent corrosion (Park et al, 2004;N R Anand1, 2013). The chemical composition and the mechanical properties are given in Table 1and Table 2, respectively (MatWeb, n.d.).…”

Section: Methodsmentioning

confidence: 99%

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Mechanical Properties Investigation of Multi-Lap Stainless Steel Sheets

Al-Attaby¹,

Al-Jumaili²

2015

JMSR

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The mechanical testing and microstructers for austenititc stainless steel have been carried out to indicate the effect of the localized heating on the spot welds. The results indicated that the increasing of the heating will increase the tensile shear strength rapidly up to the expulsion point. Therefore, the hardness increases with the increasing of the weld nugget area. Hence, the fracturing tendencies have been observed inside the nugget. Nevertheless, the outer surface cracking is developed by adding a thin layer of pure metals between the two stainless steel 304L sheets. It was shown that the addition of pure metals, 3-lap sheets decreases the joint strength as compared with the 2-lap joints for the same parameters. The effect of micro cracking and the intensive brittleness decreases the joint strength. The excessive cracking was observed in 3-lap as compared with the 2-lap joint.

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Section: Hardness Profilesupporting

confidence: 86%

Section: Methodsmentioning

confidence: 99%

Mechanical Properties Investigation of Multi-Lap Stainless Steel Sheets

Al-Attaby¹,

Al-Jumaili²

2015

JMSR

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“…[6][7][8][9][10][11][12][13][14][15][16] This process creates the lap weld by plunging and retracting of the welding tool, which does not accompany the travel of the tool. Compared with RSW, FSSW can reduce the thermal effect to the welded material due to the solid-state process.…”

Section: Introductionmentioning

confidence: 99%

Microstructural Evolution of DP980 Steel during Friction Bit Joining

Huang

Sato

Kokawa

et al. 2009

Metall Mater Trans A

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The authors study a new solid-state spot joining process, friction bit joining (FBJ), which relies on the use of a consumable joining bit. It has been reported that FBJ is feasible for the joining of steel/steel and aluminum/steel, but the metallurgical characteristics of the joint for enhancement of the properties and reliability remain unclear. Therefore, this study produced friction bit joints in DP980 steel and then examined the microstructures in the joint precisely. In this article, the microstructure distribution associated with hardness in the friction-bit-joined DP980 steel and the microstructural evolution during FBJ are reported.

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“…Although others have reported preferential etching along this same region of the stir zone, they also report large variability, depending on the welding conditions [20,22]. Sigma and chromium carbide phases are well known to reduce the corrosion resistance of austenitic stainless steel [21][22][23], and need to be suppressed if FSP is to be employed for weld repair. Based on these prior studies it is thought that dynamic recrystallization during processing may be responsible for the precipitation of these phases in the stir zone.…”

Section: Introductionmentioning

confidence: 99%

Simulation of Friction Stir Processing in 304L Stainless Steel

et al. 2016

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Abstract.A major dilemma facing the nuclear industry is repair or replacement of stainless steel reactor components that have been exposed to neutron irradiation. When conventional fusion welding is used for weld repair, the high temperatures and thermal stresses inherent in the process enhance the growth of helium bubbles, causing intergranular cracking in the heat-affected zone (HAZ). Friction stir processing (FSP) has potential as a weld repair technique for irradiated stainless steel, because it operates at much lower temperatures than fusion welding, and is therefore less likely to cause cracking in the HAZ. Numerical simulation of the FSP process in 304L stainless steel was performed using an Eulerian finite element approach. Model input required flow stresses for the large range of strain rates and temperatures inherent in the FSP process. Temperature predictions in three locations adjacent to the stir zone were accurate to within 4% of experimentally measure values. Prediction of recrystallized grain size at a location about 6mm behind the tool center was less accurate, because the empirical model employed for the prediction did not account for grain growth that occurred after deformation in the experiment was halted.

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Corrosion resistance of friction stir welded 304 stainless steel

Cited by 125 publications

References 28 publications

Mechanical Properties Investigation of Multi-Lap Stainless Steel Sheets

Mechanical Properties Investigation of Multi-Lap Stainless Steel Sheets

Microstructural Evolution of DP980 Steel during Friction Bit Joining

Simulation of Friction Stir Processing in 304L Stainless Steel

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