Effects of solution heat treatment on grain growth and degree of sensitization of AISI 321 austenitic stainless steel

2006 ◽  
Vol 41 (8) ◽  
pp. 2381-2386 ◽  
Author(s):  
Regina Célia de Sousa ◽  
José Carlos Cardoso Filho ◽  
Auro Atsushi Tanaka ◽  
Ayana Cristina S. de Oliveira ◽  
Wilman Eduardo Italiano Ferreira
Keyword(s):  
Heat Treatment ◽  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Grain Growth ◽  
Solution Heat Treatment ◽  
Degree Of Sensitization ◽  
Aisi 321

Evaluation of Corrosion Fatigue Characteristics of Artificially Sensitized Austenitic Stainless Steel Using the DCPD Method

2006 ◽  
Vol 321-323 ◽  
pp. 607-610
Author(s):  
Dong Ho Bae ◽  
Byung Bok Choi ◽  
Gyu Young Lee
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
Austenitic Stainless Steel ◽  
Corrosion Fatigue ◽  
Welding Process ◽  
Large Problem ◽  
Degree Of Sensitization ◽  
Fatigue Characteristics

Austenitic stainless steel has a large problem to decrease its corrosion resistance and mechanical properties by sensitization in the welding process. Thus, in this paper, corrosion fatigue characteristics of artificially sensitized STS304 were investigated. According as heat treatment period for sensitization increases, the Cr-carbide deposition in the grain boundary and degree of sensitization (Ia/Ir) increased. From the results, corrosion fatigue strength of sensitized STS304 was remarkably reduced compare to non-sensitized ones.

scholarly journals Effect of solution heat treatment on the pitting corrosion behavior of a high Mn austenitic stainless steel in chloride solution

2015 ◽  
Vol 68 (1) ◽  
pp. 91-96 ◽  
Author(s):  
José Wilmar Calderón Hernández ◽  
Duberney Hincapié Ladino ◽  
Cesar Roberto de Farias Azevedo ◽  
Neusa Alonso Falleiros
Keyword(s):  
Heat Treatment ◽  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Pitting Corrosion ◽  
Solution Heat Treatment ◽  
Microstructural Characterization ◽  
Pitting Potential ◽  
Δ Ferrite ◽  
Material Solution ◽  
304L Steel

The effect of solution heat treatment on the pitting corrosion resistance of 17Cr-6Mn-5Ni-1.5Cu austenitic stainless steel in 0.6M NaCl aqueous solution was evaluated. UNS S30403 (304L) steel was used as benchmark material. Solution heat treatments (SHT) were conducted at 1010°C, 1040°C, 1070°C and 1100°C. The microstructural characterization revealed the presence of δ-ferrite, especially in the asreceived condition (AR). The SHT decreased the proportion of the ferrite phase. Mnrich precipitates were observed in the as-received condition of 17Cr-6Mn-5Ni-1.5Cu steel, but they were dissolved after the SHT, causing localized Mn enrichment in the austenite. Potentiodynamic tests showed that the pitting potential (Ep) in the 304L steel was not altered significantly after SHT. On the other hand, the value of Ep of the 17Cr-6Mn-5Ni-1.5Cu steel decreased after SHT. This detrimental effect was explained by the formation of Mn enrichment areas due to the solubilization of Mn-rich precipitates, which promoted preferential Cl- adsorption in these regions.

Effect of Stabilizing Heat Treatment on Intergranular Corrosion Resistance of Welded Stainless Steel AISI 321

2012 ◽  
Vol 535-537 ◽  
pp. 692-696 ◽  
Author(s):  
Amir Mahmoudi ◽  
Mohammad Esmailian ◽  
Seyed Eshagh Aghamiri
Keyword(s):  
Heat Treatment ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
Intergranular Corrosion ◽  
Solution Heat Treatment ◽  
Steel Aisi ◽  
Titanium Carbides ◽  
Aisi 321 ◽  
Stainless Steel Aisi ◽  
Intergranular Corrosion Resistance

In this paper, to investigate the effect of stabilizing heat treatment for decreasing intergrular corrosion in welded AISI 321 steel by SMAW, at first, it was solution heat treatment in 1050°C and 3 hours , then it was stabilizing heat treatment in various times and temperatures for creating more chrome carbides which could not be created in first stage. Results indicated that, by increasing the temperature of stabilized heat treatment, more titanium carbides dissolves, while time increasing causes more creation of titanium carbides, decreasing of chrome carbides, and finally leads to increase of intergrnular corrosion resistance.

Effect of Grain Boundary Serration on the Tensile Properties of the Super 304H Heat Resistant Austenitic Stainless Steel

2010 ◽  
Vol 654-656 ◽  
pp. 170-173 ◽  
Author(s):  
Sung Min Hong ◽  
Dong Joon Min ◽  
Eric Fleury
Keyword(s):  
Heat Treatment ◽  
Tensile Strength ◽  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Grain Boundary ◽  
Tensile Properties ◽  
Solution Heat Treatment ◽  
Room Temperature ◽  
Tensile Ductility ◽  
Heat Resistant

Grain boundary serrations were produced in heat-resistant austenitic stainless steel containing Cu by applying after solution heat-treatment a holding time in the range 700-800oC between 30 minutes to 3 hours. These special treatments provide an enhancement of the tensile ductility of about 40 and 113%at room temperature and 750oC, respectively, while no significant change in the yield stress and tensile strength could be observed.

scholarly journals The Effect of Aging on Precipitates, Mechanical and Magnetic Properties of Fe-21Cr-15Ni-6Mn-Nb Low Magnetic Stainless Steel

Metals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 819
Author(s):  
Changsheng Li ◽  
Kun Li ◽  
Jingbo Dong ◽  
Jinyi Ren ◽  
Yanlei Song
Keyword(s):  
Heat Treatment ◽  
Tensile Strength ◽  
Stainless Steel ◽  
Magnetic Properties ◽  
Solution Heat Treatment ◽  
Aging Treatment ◽  
Relative Magnetic Permeability ◽  
Coarsening Behavior ◽  
The Matrix ◽  
Coherent Orientation

The effect of aging on the precipitates, mechanical and magnetic properties of Fe-21Cr-15Ni-6Mn-Nb low magnetic stainless steel were investigated. The steel was aged at 550–750 °C for 2 h after solution heat treatment at 1100 °C for 1 h. During the aging treatment, the (Nb, V)(C, N) particles gradually precipitated in the grain, which were coherent or semi-coherent with the matrix. When the aging temperature was beyond 650 °C, the coarsening rate of (Nb, V)(C, N) particles increase rapidly and the coherent orientation between (Nb, V)(C, N) particles and the matrix was lost gradually. Meanwhile, coarse M23C6 was distributed at the grain boundary with chain shape, which was non-coherent with the matrix. The coarsening behavior of (Nb, V)(C, N) precipitates in the grain was analyzed, and the size of the particles precipitated after aging treatment at 650°C for different time was calculated and studied. After aging treatment at 650 °C for 2 h, the yield strength and tensile strength of the stainless steel was 705.6 MPa and 1002.3 MPa, the elongation and the relative magnetic permeability was 37.8% and 1.0035, respectively.

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