Delta Ferrite
Mostrando 1-10 de 10 artigos, teses e dissertações.
-
1. Corrosion Behavior of 316L and Alloy 182 Dissimilar Weld Joint with Post-Weld Heat Treatment
ABSTRACT Austenitic stainless steel and nickel-base alloys welds are widely used in nuclear reactor components, plants of energy generation, chemical, and petrochemical industries, due to their high corrosion resistance. The post weld heat treatments (PWHT) are generally applied to welding in order to relieve the welding residual stress. The aim of this work
Matéria (Rio J.). Publicado em: 16/09/2019
-
2. Effect of sulfate on the pitting potential of austenitic stainless steels 18Cr8Ni and 17Cr6Mn5Ni in chloride media
Abstract Pitting corrosion resistance of two austenitic stainless steels, 18Cr8Ni (Type 304L or UNS S30403 stainless steel) and 17Cr6Mn5Ni, was evaluated in three electrolytic solutions containing a fixed concentration of 0.6M sodium chloride and different additions of sodium sulfate, 0.06M, 0.15M or 0.6M. Cyclic potentiodynamic polarization tests were perfo
REM, Int. Eng. J.. Publicado em: 2019-03
-
3. Análisis comparativo en la determinación de ferrita delta para aceros inoxidables austeníticos
ABSTRACT In the welding of austenitic stainless steels, the determination of delta ferrite (δ-ferrite) is very important to assess the susceptibility of weld metal to hot cracking, one of the major problems related to weldability, metallurgical and mechanical behavior of this type of steels. The determining δ-ferrite in the weld metal can be performed with
Matéria (Rio J.). Publicado em: 19/07/2018
-
4. Influence of Microstructure on the Corrosion Resistance of AISI 317L (UNS S31703)
The AISI 317L stainless steel is an austenitic grade with at least 3%Mo. Recently, this steel has replaced AISI 316L in many applications in chemical and petrochemical industries, due to its higher pitting corrosion resistance. The microstructure of the hot rolled and annealed material studied in this work consists of austenitic grains and 4.0% of delta ferr
Mat. Res.. Publicado em: 15/05/2017
-
5. Effect of Heat Input on Mechanical and Metallurgical Properties of Gas Tungsten Arc Welded Lean Super Martensitic Stainless Steel
Welding of 6mm thick AISI: 410S lean super martensitic stainless steel (LSMSS) under different heat input of 7.97, 8.75 and 10.9 kJ/cm was carried out by gas tungsten arc welding process. The influence of heat input on metallurgical and mechanical properties in weld and HAZ region was studied. The tensile tests were carried out at different temperatures, nam
Mat. Res.. Publicado em: 05/04/2016
-
6. Microstructural Transformations in Dissimilar Welds between Austenitic Stainless Steel and Ferritic Stainless Steel
This research studies the metallurgical transformations taking place the SMAW welding of AISI 316L austenitic stainless steel with AISI 430 ferritic stainless steel. To perform the study were used two different electrodes, AWS E309L austenitic and AWS E2209-16 duplex stainless steels 3.2 mm diameter. The joints were made with a single-pass welding including
Soldag. insp.. Publicado em: 2015-03
-
7. Operational and metallurgic aspects in welding of ferritic stainless steel with 11% chromium / Aspectos operacionais e metalúrgicos da soldagem do aço inoxidável ferrítico com 11% de cromo
Os aços inoxidáveis ferríticos, geralmente, apresentam baixa soldabilidade em relação aos austeníticos, fato que limitou sua a aplicabilidade em estruturas soldadas durante muito tempo. Para que se consiga boas propriedades mecânicas nessas ligas, além do controle da composição da liga, esses aços passam por rigorosos tratamentos térmicos como é
Publicado em: 2009
-
8. Microestrutura e deformação a quente de um aço dinx20cr13 na laminação de tubos sem costura
The DIN X20Cr13 stainless steel is a high technological alloy usually used in oil industry for onshore and offshore tubing applications. In this study DIN X20Cr13 equilibrium diagrams were made by Thermo-Calc software to study transformation reactions in solid state phases. This stainless steel was submitted to different heat treatments in order to generate
Publicado em: 2008
-
9. Mechanical properties of cast CA15 and CA6NM stainless steels / Propriedades mecânicas de tração e impacto dos aços inoxidáveis CA15 e CA6NM
The subject of this work was to study the mechanical properties, based in tensile and impact tests, of two stainless martensitic steels cast under designations of ASTM Standards, namely the CA15 steel, a steel with 12% of Cr, and the CA6NM steel, a steel with 12% Cr and 4% Ni. For both steel grades bar tests were machined out from Keel Block coupons test cas
Publicado em: 2007
-
10. Estudo dos fenômenos que ocorrem durante o recozimento dos aços inoxidáveis austeníticos 304L e 316L deformados em várias temperaturas. / Study of the phenomena that occur during the annealing of worked AISI 304L and 316L austenitic stainless steels deformed at various temperatures.
Hot rolled AISI 304L and 316L austenitic stainless steel sheets, 6mm thick, presented recrystallized equiaxial grains with austenite and islands of delta ferrite, in larger quantities mainly in the center of both steel sheets. The austenite had a weak texture, with a gradient through the thickness. The solution annealing eliminated delta ferrite, however it
Publicado em: 2006