Relationship between ferrite–austenite phase transformation and precipitation behavior of sigma phase in super duplex stainless steel weldment

2022 ◽  
Author(s):  
Shotaro Yamashita ◽  
Kazuyuki Ike ◽  
Kazuma Yamasaki ◽  
Fu-Gao Wei ◽  
Kun Wang ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Phase Transformation ◽  
Duplex Stainless Steel ◽  
Sigma Phase ◽  
Austenite Phase ◽  
Super Duplex Stainless Steel ◽  
Precipitation Behavior ◽  
Steel Weldment ◽  
Stainless Steel Weldment

scholarly journals Fractography. .SIGMA. Phase Embrittlement of Duplex Stainless Steel Weldment.

1997 ◽  
Vol 46 (6) ◽  
pp. 592-596 ◽  
Author(s):  
Toshio KURODA ◽  
Yasushi KIKUCHI ◽  
Fukuhisa MATSUDA ◽  
Kazuyuki OE
Keyword(s):  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Sigma Phase ◽  
Steel Weldment ◽  
Stainless Steel Weldment

scholarly journals Thermal cycling induced stress–assisted sigma phase formation in super duplex stainless steel

2019 ◽  
Vol 182 ◽  
pp. 108003 ◽  
Author(s):  
Jian-Sin Li ◽  
Guan-Ju Cheng ◽  
Hung-Wei Yen ◽  
Liberty T. Wu ◽  
Yo-Lun Yang ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Thermal Cycling ◽  
Duplex Stainless Steel ◽  
Phase Formation ◽  
Sigma Phase ◽  
Super Duplex Stainless Steel ◽  
Induced Stress

Influence of Argon-Nitrogen Gas to Balance the Microstructure in the Welding of Super Duplex Stainless Steel

2016 ◽  
Vol 836 ◽  
pp. 165-172
Author(s):  
Suheni
Keyword(s):  
Stainless Steel ◽  
Weld Metal ◽  
Duplex Stainless Steel ◽  
Heat Input ◽  
Oil And Gas ◽  
Austenite Phase ◽  
Super Duplex Stainless Steel ◽  
Shielding Gas ◽  
Input Variables ◽  
Protective Gas

Super duplex stainless steel is steel that has a corrosion resistance and good mechanical strength so that used in industry especially in oil and gas and petrochemical industry. In use in the field is often used for the connection process by welding methods. To produce good welds, it should be noted that the welding procedures and parameters used , especially the heat input. In this study is used the heat input variables shielding gas composition to determine how much influence on the balance of ferrite - austenite phase structure in the weld stainless steels SAF 2507 super duplex with tungsten inert gas welding method (TIG). Heat input varied by applying different welding speed 1,3,4 and 5 mm /sec while the shielding gas is used 100 % argon, 98 % argon + 2 % nitrogen and 95 % argon + 5 % nitrogen. The result showed that at different welding speeds generated depth and width of the weld metal which is different. Likewise the use of protective gas will produce a different ratio wide and deep of weld metal which is different. By using protective gas 95 % argon + 5 % nitrogen squeak - ausenit phase, resulting in weld metal that is relatively balanced than others. On a slow welding in addition to produce a large heat input also produces weld metal hardness at high and affect the growth of the austenite phase. The higher the heat input ( 2,280 kJ / mm ) , the lower the austenite phase in the weld metal.

scholarly journals Microscopic Observation of Precipitation Behavior at Friction Stirring Zone of Super Duplex Stainless Steel

2019 ◽  
Vol 60 (9) ◽  
pp. 2003-2007 ◽  
Author(s):  
Itto Sugimoto ◽  
Seung Hwan C. Park ◽  
Satoshi Hirano ◽  
Hikaru Saito ◽  
Satoshi Hata
Keyword(s):  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Microscopic Observation ◽  
Super Duplex Stainless Steel ◽  
Precipitation Behavior
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