Chromium Nitride Precipitation Behavior in Weld Heat-affected Zone of High Nitrogen Stainless Steel.

Ogawa, Makoto; Hiraoka, Kazuo; Katada, Yasuyuki; Sagara, Masayuki; Tsukamoto, Shiro

doi:10.2355/isijinternational.42.1391

Cited by 53 publications

(23 citation statements)

References 6 publications

(6 reference statements)

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“…% respectively, which indicated that only a little leak of nitrogen happened in SZ during FSW process. From the cross-section view of the FSW joint (Figure 2a), it was clearly observed that no nitrogen blowhole, which often formed in traditional fusion welding methods, was found in the joint [7]. Therefore, it can be concluded that the FSW is an effective welding method for this steel to prevent nitrogen desorption.…”

Section: Macro-and Microstructure Observationmentioning

confidence: 85%

“…Additionally, given the lack of nickel resources, high nitrogen martensitic stainless steel can be considered as one of the promising next generation martensitic stainless steels. However, in the case of the welding of martensitic stainless steel with high nitrogen content, conventional fusion welding processes remain some common problems, such as nitride desorption, formation of nitrogen associated pore, solidification cracks in stir zone (SZ) and nitride precipitation in the heat affected zone (HAZ) because of high heat-input [6][7][8]. These weld defects can deteriorate the mechanical properties and corrosion The experimental plates were butt-welded in the direction parallel to the rolling direction at a rotation rate of 300 rpm and a traveling rate of 100 mm/min with a W-Re tool that possessed a shoulder diameter of 20 mm, probe diameters of 4.5-8 mm (tapered pin) and a probe length of 4.2 mm.…”

Section: Introductionmentioning

confidence: 99%

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Microstructure, Mechanical and Corrosion Properties of Friction Stir Welding High Nitrogen Martensitic Stainless Steel 30Cr15Mo1N

Geng

Feng

et al. 2016

Metals

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High nitrogen martensitic stainless steel 30Cr15Mo1N plates were successfully welded by friction stir welding (FSW) at a tool rotation speed of 300 rpm with a welding speed of 100 mm/min, using W-Re tool. The sound joint with no significant nitrogen loss was successfully produced. Microstructure, mechanical and corrosion properties of an FSW joint were investigated. The results suggest that the grain size of the stir zone (SZ) is larger than the base metal (BM) and is much larger the case in SZ-top. Some carbides and nitrides rich in chromium were found in BM while not observed in SZ. The martensitic phase in SZ could transform to austenite phase during the FSW process and the higher peak temperature, the greater degree of transformation. The hardness of SZ is significantly lower than that of the BM. An abrupt change of hardness defined as hard zone (HZ) was found in the thermo-mechanically affected zone (TMAZ) on the advancing side (AS), and the HZ is attributed to a combination result of temperature, deformation, and material flow behavior. The corrosion resistance of SZ is superior to that of BM, which can be attributed to less precipitation and lower angle boundaries (LABs). The corrosion resistance of SZ-bottom is slight higher than that of SZ-top because of the finer grained structure.

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Section: Macro-and Microstructure Observationmentioning

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Microstructure, Mechanical and Corrosion Properties of Friction Stir Welding High Nitrogen Martensitic Stainless Steel 30Cr15Mo1N

Geng

Feng

et al. 2016

Metals

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“…Moreover, the solution treated high nitrogen steel shows more thermal sensitivity in the heat processing such as hot rolling and welding process with the increasing heat input [2]. Many investigations [3][4][5][6] have been carried out in the mechanical properties of high nitrogen austenitic stainless steel, which represents a combination of strength and corrosion resistance without much loss of toughness through relatively low production cost.…”

Section: Introductionmentioning

confidence: 99%

Microstructural Evolution and Hardness Profile of High Nitrogen Austenitic Steel After Arc-laser Hybrid Welding

Shan¹,

Huang²,

Zhang³

et al. 2017

dtetr

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Abstract. An arc-laser hybrid welding was performed on high nitrogen austenitic steel which was used in the industries. Micro-vickers hardness tester, Optical microscopy, secondary and backscattered electron beam image analysis, image analyzer and Energy Dispersive X-ray Spectroscopy (EDS) in Scanning Electron Microscopy (SEM) were applied to reveal the microstructural details. The results indicate that, the microstructures of the weld bead are consisted of the dendrite-like austenitic phase and the small rod-like delta ferritic phase located between the dendrites. The solidification mode of the bead is AF mode. The grain size in heat affected zone (HAZ) is larger than the parent metal, and the near the bead area, the larger the size of the grain.

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“…The coating temperature of HNS during HAp formation is important, because the release of N 2 from HNS by high-temperature treatment causes the phase change from austenite to ferrite [32,33]. We have employed chemical solution deposition for forming HAp on HNS at temperatures below 100 • C [34,35].…”

Section: Introductionmentioning

confidence: 99%

Preparation and biological evaluation of hydroxyapatite-coated nickel-free high-nitrogen stainless steel

Sasaki

Inoue

Katada

et al. 2012

Science and Technology of Advanced Materials

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Calcium phosphate was formed on nickel-free high-nitrogen stainless steel (HNS) by chemical solution deposition. The calcium phosphate deposition was enhanced by glutamic acid covalently immobilized on the surface of HNS with trisuccinimidyl citrate as a linker. X-ray diffraction patterns and Fourier transform infrared spectra showed that the material deposited on glutamic acid-immobilized HNS within 24 h was low-crystallinity calcium-deficient carbonate-containing hydroxyapatite (HAp). The biological activity of the resulting HAp-coated HNS was investigated by using a human osteoblast-like MG-63 cell culture. The HAp-coated HNS stimulated the alkaline-phosphate activity of the MG-63 culture after 7 days. Therefore, HAp-coated HNS is suitable for orthopedic devices and soft tissue adhesion materials.

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Chromium Nitride Precipitation Behavior in Weld Heat-affected Zone of High Nitrogen Stainless Steel.

Cited by 53 publications

References 6 publications

Microstructure, Mechanical and Corrosion Properties of Friction Stir Welding High Nitrogen Martensitic Stainless Steel 30Cr15Mo1N

Microstructure, Mechanical and Corrosion Properties of Friction Stir Welding High Nitrogen Martensitic Stainless Steel 30Cr15Mo1N

Microstructural Evolution and Hardness Profile of High Nitrogen Austenitic Steel After Arc-laser Hybrid Welding

Preparation and biological evaluation of hydroxyapatite-coated nickel-free high-nitrogen stainless steel

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