Mechanical and Microstrutural Characterization of Weldments of Ferritic Stainless Steel AISI 444 Using Austenitic Stainless Steels Filler Metals

2012 ◽  
pp. 176-189
Author(s):  
Pedro Duarte Antunes ◽  
Edmilson Otoni Corrêa ◽  
Nancy Delducca Barbedo ◽  
Paola de Oliveira Souza ◽  
José Luiz Gonçalves ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Ferritic Stainless Steel ◽  
Stainless Steels ◽  
Austenitic Stainless Steels ◽  
Steel Aisi ◽  
Filler Metals ◽  
Stainless Steel Aisi

Mechanical and Microstrutural Characterization of Weldments of Ferritic Stainless Steel AISI 444 Using Austenitic Stainless Steels Filler Metals

2012 ◽  
Vol 9 (2) ◽  
pp. 103436
Author(s):  
Pedro Duarte Antunes ◽  
Edmilson Otoni Corre^a ◽  
Nancy Delducca Barbedo ◽  
Paola de Oliveira Souza ◽  
José Luiz Gonçalves ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Ferritic Stainless Steel ◽  
Stainless Steels ◽  
Austenitic Stainless Steels ◽  
Steel Aisi ◽  
Filler Metals ◽  
Stainless Steel Aisi

scholarly journals Fatigue Behavior of Metastable Austenitic Stainless Steels in LCF, HCF and VHCF Regimes at Ambient and Elevated Temperatures

Metals ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 704 ◽  
Author(s):  
Smaga ◽  
Boemke ◽  
Daniel ◽  
Skorupski ◽  
Sorich ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Stainless Steels ◽  
Deformation Behavior ◽  
High Cycle Fatigue ◽  
Elevated Temperatures ◽  
Austenitic Stainless Steels ◽  
Cycle Fatigue ◽  
Metastable Austenitic Stainless Steel ◽  
Steel Aisi ◽  
Stainless Steel Aisi

Corrosion resistance has been the main scope of the development in high-alloyed low carbon austenitic stainless steels. However, the chemical composition influences not only the passivity but also significantly affects their metastability and, consequently, the transformation as well as the cyclic deformation behavior. In technical applications, the austenitic stainless steels undergo fatigue in low cycle fatigue (LCF), high cycle fatigue (HCF), and very high cycle fatigue (VHCF) regime at room and elevated temperatures. In this context, the paper focuses on fatigue and transformation behavior at ambient temperature and 300 °C of two batches of metastable austenitic stainless steel AISI 347 in the whole fatigue regime from LCF to VHCF. Fatigue tests were performed on two types of testing machines: (i) servohydraulic and (ii) ultrasonic with frequencies: at (i) 0.01 Hz (LCF), 5 and 20 Hz (HCF) and 980 Hz (VHCF); and at (ii) with 20 kHz (VHCF). The results show the significant influence of chemical composition and temperature of deformation induced ´-martensite formation and cyclic deformation behavior. Furthermore, a “true” fatigue limit of investigated metastable austenitic stainless steel AISI 347 was identified including the VHCF regime at ambient temperature and elevated temperatures.

Quantitative Analysis of the Sensitization of an Austenitic Stainless Steel Aged between 600 and 900°C through Electrochemical and Microstructural Measurements

2020 ◽  
Vol 1012 ◽  
pp. 430-435
Author(s):  
Ramaiany Carneiro Mesquita ◽  
Ariele Rebeca Martins Ribeiro ◽  
Cintia Leite Gonçalves ◽  
Diogo Marcelo Lima Ribeiro ◽  
Sarah Caroline Gomes Caldas
Keyword(s):  
Stainless Steel ◽  
Quantitative Analysis ◽  
Austenitic Stainless Steel ◽  
Stainless Steels ◽  
Microstructural Analysis ◽  
Austenitic Stainless Steels ◽  
Aisi 304 ◽  
Temperature Range ◽  
Steel Aisi ◽  
Stainless Steel Aisi

Is the concern with latent phenomenon of sensitization, as it exposes austenitic stainless steels to one of the most severe types of corrosion, intergranular, caused by chrome impoverishment in some regions after the material has been treated thermally in a temperature range between 450°C and 850°C. The aim of this study is to identify the conditions under which the stainless steel AISI 304 austenitic will sensitize, microstructural analysis and reactivation potentiodynamics technique by Double cycle method (DL-EPR). In steel samples were subjected to different ranges of time and temperature. The behavior of the degree of sentiment reveals that the rainfall happens so intense under the conditions under study with the exception of 900oC - 1, 2, and 6, which was observed and proven both by microstructural analysis and the DL-EPR.

scholarly journals CYCLIC OXIDATION OF FERRITIC STAINLESS STEEL AISI 409

2015 ◽  
Vol 12 (3) ◽  
pp. 237-243 ◽  
Author(s):  
Samara Clotildes Saraiva Rodrigues ◽  
Diego Machado dos Santos ◽  
Ayrton de Sá Brandim ◽  
Maura Célia Cunha e Silva ◽  
Vanessa de Freitas Cunha Lins ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Ferritic Stainless Steel ◽  
Cyclic Oxidation ◽  
Steel Aisi ◽  
Stainless Steel Aisi

The Smooth Bootstrap Approach to the Distribution of a Shape in the Ferritic Stainless Steel AISI 434L Powders

2013 ◽  
Vol 197 ◽  
pp. 162-167 ◽  
Author(s):  
Jacek Pietraszek ◽  
Aneta Gądek-Moszczak
Keyword(s):  
Stainless Steel ◽  
Image Analysis ◽  
Ferritic Stainless Steel ◽  
Wide Spectrum ◽  
Quantitative Description ◽  
Accurate Information ◽  
Fast Method ◽  
Shape Factors ◽  
Steel Aisi ◽  
Stainless Steel Aisi

The ferritic-austenitic stainless steel was obtained by sintering the mixture of ferritic stainless steel AISI 434L powders with different amount of additions: Mn, Ni and Si. The structure of obtained sintered samples was investigated by computer image analysis methods. In porous materials the character of the pore structure strongly effects on its mechanical properties. Accurate information about pores shape is important information for technological process and quality control of produced materials as well. The images of the porous microstructure were analyzed using ADCIS Aphelion analytical software. Analyzed pores have complex and irregular shapes and thus authors decided to appoint different shape factors to obtain its proper quantitative description. Data obtained from image analysis process were statistically analyzed. Authors used a special resampling approach known as smooth bootstrapping to smoothing cumulative empirical distributions. The results obtained during resampling procedure have been compared with raw data from verification set and guidelines for the application of the proposed approach have been formulated. The validity of the proposed approach was positively verified and it significantly improved quality of the results. The smoothing and imputing of data allow to avoid numerical artifacts that may arise during the classical statistical calculations on irregular data originated from image analysis obtained from sintered samples. Efficient, reliable and relatively fast method for accessing the distribution of any others quantitative parameters describing microstructure of the materials is very interesting proposal for wide spectrum of application.

Complex Magnetic Investigation of Ferritic Stainless Steel

2005 ◽  
Vol 473-474 ◽  
pp. 231-236 ◽  
Author(s):  
István Mészáros
Keyword(s):  
Stainless Steel ◽  
Ferritic Stainless Steel ◽  
Magnetic Measurements ◽  
Ferromagnetic Material ◽  
Saturation Induction ◽  
Steel Aisi ◽  
Working Principle ◽  
Non Destructive ◽  
Aisi 430 ◽  
Stainless Steel Aisi

Magnetic Barkhausen noise measurement (MBN) is a relatively new non-destructive detection technique. Its working principle is based on Barkhausen discontinuities or noise when a ferromagnetic material is subjected to a varying magnetic field. MBN is being used to characterise the stress state of a ferritic stainless steel (AISI 430). Other magnetic parameters such as saturation induction (BMax), remnant induction (BR), coercive field (HC) and maximal relative permeability (PMax) derived from the hysteresis loop have also been used to support the results achieved using MBN. Microstructural changes due to cold working and heat treatments were characterized by the applied magnetic measurements. The MBN technique was proved to be a useful non-destructive and quantitative method for microstuctural investigation of the investigated ferritic stainless steel.

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