Development of friction stir welding of high strength steel sheet

Matsushita, Muneo; Kitani, Y.; Ikeda, R.; Oi, K.; Fujii, Hidetoshi

doi:10.1533/978-1-78242-164-1.87

Cited by 44 publications

(4 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As a result, the grain size of austenite that forms in the heat affected zone are often not as large as those for fusion welding. 11 In addition, severe deformation and flow of plasticised steel alter the stability of austenite in the thermomechanically affected zone because of the stored energy which affects its decomposition to daughter phases. In contrast, the austenite formed during cooling of molten weld metal in fusion welding is hardly affected by any stored energy.…”

Section: " "mentioning

confidence: 99%

“…[1][2][3][4][5] In contrast, the much larger market for welding of steels remains largely out of the reach of FSW because of the high cost and insufficient durability of the tools. [6][7][8][9][10][11][12][13][14] Most of the previous studies on steels [6][7][8][9][10][11][12] were conducted on small weld lengths of specimens that precluded any rigorous evaluation of tool durability. A recent review 14 of the tool materials indicates that severe stresses and high temperatures pose a formidable challenge for the development of cost effective and durable tools for the FSW of hard alloys.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Friction stir welding of mild steel: Tool durability and steel microstructure

Bhadeshia

DebRoy

2014

Materials Science and Technology

View full text Add to dashboard Cite

In previous work, we have established a scheme that exploits a three-dimensional heat and mass flow model to assess tool durability and define the domains of satisfactory tool life in the context of welding difficult aluminium alloys. We now apply this scheme to the friction stir welding of steel, and extend the calculations to cover consequences on the microstructure of the steel while optimizing tool life. This is the first published model that covers both the processing parameters and the consequences on the physical metallurgy of the steel.

show abstract

Section: " "mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Friction stir welding of mild steel: Tool durability and steel microstructure

Bhadeshia

DebRoy

2014

Materials Science and Technology

View full text Add to dashboard Cite

show abstract

“…It has proven to be an excellent and eco-friendly joining technology for aluminum alloys [2,3]. Recently, FSW has proven to be perfectly appropriate for welding high-melting temperature alloys, such as Fe- [4][5][6][7], Ni- [8], and Ti-based alloys [7].…”

Section: Introductionmentioning

confidence: 99%

Pitting corrosion susceptibility of friction stir welded lean duplex stainless steel joints

Atapour

Sarlak

Esmailzadeh

2015

Int J Adv Manuf Technol

View full text Add to dashboard Cite

The effect of friction stir welding (FSW) on the pitting corrosion resistance of a lean duplex stainless steel was investigated in chloride-containing and chloride-free electrolytes. FSW was carried out by employing a constant rotation speed of 800 rpm at the welding speeds of 50, 100, and 150 mm/min using WC-based tool. Cyclic polarization results showed the same corrosion resistance of the base metal and welded joints in 0.1 M H 2 SO 4 . The optical microscopy observations after cyclic polarization tests revealed that no signs of pitting corrosion were evident for the base metal and different FS welds in chloride-free 0.1 M H2SO4 solution. In contrast, a wide positive hysteresis loop indicative of pitting corrosion susceptibility was displayed for the base metal and FS welds in 0.1 M H 2 SO 4 +0.1 M NaCl solution. The optical micrographs of pitting corrosion in the base metal and various FS welds demonstrated that the size of pits was decreased and the number of pits was increased after FSW. It was also found that increasing the welding speed led to an increase in the number of pits and a decrease in the size of pits. In other words, the resistance to pit growth was improved by decreasing the heat input during FSW. These results were interpreted with respect to the noticeable grain refinement that occurred during FSW.

show abstract

“…The tendency of steel for martensitic transformation can be better explained based on the cooling rate, maximum times necessary for fully martensite transformation i.e., M s from the peak 1360K to 660K temperature t M (s) and the minimum times for no martensite transformation t B (s). The t M , t B and the time between 1360 K and 660K is 0.15s, 97s and 88s, respectively [14]. This indicates that the cooling rate at the wake of the traversing tool is high enough to results in martensitic structure in the stir zone.…”

Section: F Microstructure Of the Fss Zonementioning

confidence: 91%

Friction Stir Surfacing of Cold Sprayed Bainitic Steel

Venkateswaran¹,

Mishra²

2013

IJARME

View full text Add to dashboard Cite

A superficial composite layer was produced by friction stir surfacing (FSS) on high strength bainitic steel, cold sprayed with the Cu-Y2O3-ZrO2 and Zn-Y2O3-ZrO2 metal-oxide powders. The FSS resulted consolidation of the elemental powders in the cold sprayed (CS) layer with some melting of Zn and Cu. The formation of a continuous, adherent layer on the steel surface facilitates closing of large pores at the coating-substrate interface. The consolidated layer on the steel surface showed comminution of the coarse oxide particles and concomitant reduction in the average particle size. The FSS resulted in a composite layer consisting of the hard martensite structure up to 0.4 mm from the surface. The region just below the top solidified layer exhibited the soft ferrite and pearlite structure with narrow microstructural bands of fine martensite. The net torque and in-plane forces for the composite layer production are significantly different from the Zn and Cu cold sprayed layers.

show abstract

Development of friction stir welding of high strength steel sheet

Cited by 44 publications

References 19 publications

Friction stir welding of mild steel: Tool durability and steel microstructure

Friction stir welding of mild steel: Tool durability and steel microstructure

Pitting corrosion susceptibility of friction stir welded lean duplex stainless steel joints

Friction Stir Surfacing of Cold Sprayed Bainitic Steel

Contact Info

Product

Resources

About