Tensile Deformation Behavior and Phase Transformation in the Weld Coarse-Grained Heat-Affected Zone of Metastable High-Nitrogen Fe-18Cr-10Mn-N Stainless Steel

2013 ◽  
Vol 44 (7) ◽  
pp. 3069-3076 ◽  
Author(s):  
Joonoh Moon ◽  
Tae-Ho Lee ◽  
Seong-Jun Park ◽  
Jae-il Jang ◽  
Min-Ho Jang ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Phase Transformation ◽  
Heat Affected Zone ◽  
Deformation Behavior ◽  
Tensile Deformation ◽  
Coarse Grained ◽  
High Nitrogen ◽  
Tensile Deformation Behavior

scholarly journals Correlation between Tensile Deformation Behavior and Microstructural Morphology of Nuclear Grade Austenitic Stainless Steel Weld Joints using Infrared Thermography Technique

2020 ◽  
Vol 92 (1) ◽  
pp. 7-15
Author(s):  
A.K. Lakshminarayanan ◽  
R. Rajasekaran ◽  
M. Menaka
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Infrared Thermography ◽  
Base Metal ◽  
Arc Welding ◽  
Deformation Behavior ◽  
Tensile Deformation ◽  
Weld Joints ◽  
Gas Tungsten Arc ◽  
Tensile Deformation Behavior

Tensile deformation behavior of nuclear grade Austenitic Stainless Steel (SS) and its weld joints fabricated by Gas Tungsten Arc Welding (GTAW) and Activated flux Gas Tungsten Arc Welding (AGTAW) processes were studied and correlated with relevant microstructural morphologies using Infrared Thermography (IRT) technique. The microstructure of base metal showed a complete austenite phase. GTAW Fusion Zone (FZ) exhibited both primary ferrite and primary austenite mode of solidification. Meantime, AGTAW FZ exhibited only primary austenite mode of solidification A strain rate of 4.4x10-4 s-1 was used during the tensile test of the base metal and weld samples. The failure locations of the base metal, GTAW and AGTAW samples were noticed at the center of the gauge portion, the base metal side away from Fusion Line (FL) and Heat Affected Zone (HAZ) respectively. Temperature variations of the base metal and weld zones were recorded in the form of thermograms using the IR camera at the different stages of the tensile deformation. During deformation study, peak temperatures of 39.2 oC, 38.8 oC and 34 oC were observed at the base metal, GTAW and AGTAW samples respectively. The lesser peak temperature of the AGTAW sample compared to the base metal and GTAW samples indicated that the AGTAW sample undergone lesser deformation. Moreover, tensile deformation behaviors of the base metal and weld samples were correlated with their microstructural morphologies using corresponding temperature curves.

Deformation Behavior of Nitrogen Bearing Austenitic Steels with Various Nitrogen Contents

2007 ◽  
Vol 345-346 ◽  
pp. 117-120 ◽  
Author(s):  
Yong Suk Kim ◽  
Seung Man Nam ◽  
Sung Joon Kim
Keyword(s):  
Nitrogen Content ◽  
Deformation Behavior ◽  
Tensile Deformation ◽  
Constant Strain Rate ◽  
Tensile Tests ◽  
Austenitic Steels ◽  
High Nitrogen ◽  
Tensile Deformation Behavior ◽  
Nitrogen Steel ◽  
Nitrogen Contents

Tensile deformation behavior of the high-nitrogen austenitic Fe-18Cr-14Mn-4Ni-3MoxN steel with various nitrogen contents has been studied. The nitrogen content of the steel varied from 0.28 to 0.88 wt. %. Nitrogen atoms in high nitrogen steel (HNS) make an interstitial solid solution by being scattered in the steel constituting a short-range order. They strengthen the austenite matrix without deteriorating ductility of the steel. The present investigation was carried out to elucidate the hardening and plasticizing role of the nitrogen in the HNS by analyzing tensile deformation behavior of the steel containing various nitrogen contents. Tensile tests of the steel specimens were performed at room temperature with a constant strain rate of 5x10-5/sec. Microstructure of the tested specimens was analyzed to explore the deformation mechanism of the HNS as a function of nitrogen contents. The flow stress of the steel increased with the increase of the nitrogen content; however, the specimen with the highest nitrogen content (0.88 wt. %) showed saturated strength and reduced ductility. The superior mechanical property of the HNS was explained by the low stacking fault energy and the twin-induced plasticity provoked by the nitrogen.

Tensile deformation behavior of stainless steel clad aluminum bilayer sheet

1997 ◽  
Vol 222 (2) ◽  
pp. 158-165 ◽  
Author(s):  
Shi-Hoon Choi ◽  
Keun-Hwan Kim ◽  
Kyu Hwan Oh ◽  
Dong Nyung Lee
Keyword(s):  
Stainless Steel ◽  
Deformation Behavior ◽  
Tensile Deformation ◽  
Tensile Deformation Behavior
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