The effects of deformation induced martensite on the sensitization of austenitic stainless steels

Briant, C. L.; Ritter, Ann

doi:10.1007/bf02655120

Cited by 79 publications

(46 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The increasing carbon content decreases the sensitization time. This phenomenon involves development of carbide precipitates (Cr 23 C 6 ) in the grain boundary region in the temperature range from 480 to 850°C resulting in chromium depletion near the grain boundary; as a result, grain boundary region is prone to preferential intergranular corrosion [62][63][64]. The SS studied in our case has relatively low content of carbon, i.e., 0.023 wt% and the total annealing time for temperatures between 450 and 650°C was 11 h. For 304 SS with similar carbon content aged for 50 h at 670°C, Trillo and Murr found that a few small carbides precipitations were nucleated on high-angle grain boundaries [65].…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Reverse transformation of deformation-induced martensite in austenitic stainless steel studied by positron annihilation

2014

View full text Add to dashboard Cite

The reversion of deformation-induced a 0 -martensite in tension-deformed 1.4301 (EN) stainless steel was investigated using positron annihilation spectroscopy. The Doppler broadening of the annihilation line and positron lifetime spectroscopy were applied to study defect structure and its annealing behavior in samples with a similar deformation level but varying in a 0 -martensite amount. The difference in a 0 -martensite was obtained by applying different deformation temperatures, i.e., liquid nitrogen temperature, room temperature, and 200°C. The cumulative annealing of the tension-deformed samples and measurement of the positron annihilation characteristics show the gradual annealing of defects in the temperature range between 200 and 400°C due to the recovery and recrystallization. However, in the temperature range between 450 and 650°C, the generation of vacancy clusters which trap positrons is revealed. This temperature range coincides with the temperature range of a 0 -martensite reversion which is confirmed by microhardness and magnetization measurements. The detected large vacancy clusters consisting of 6-9 vacancies can occur at the interface between austenite and a 0 -martensite phases due to the volume contraction accompanying bcc/fcc change.

show abstract

Section: Discussionmentioning

confidence: 99%

“…It is known that cold working promotes the formation of both the carbides and intermetallic phases and deformation reduces the time required for sensitization [66][67][68]. The effect is more pronounced in the a 0 -martensite containing 304 SS than in the type 316 SS, especially at temperatures below 600°C [62].…”

Section: Discussionmentioning

confidence: 99%

Reverse transformation of deformation-induced martensite in austenitic stainless steel studied by positron annihilation

2014

View full text Add to dashboard Cite

show abstract

“…Por tanto, si la martensita está presente antes de realizar los tratamientos térmicos, las temperaturas y los tiempos requeridos para producir sensibilización son mucho más bajos que en materiales no trabajados en frío (13). Este fenómeno se explica debido al mayor coeficiente de difusión, tanto del carbono como del cromo en la red tetragonal centrada en el cuerpo de la martensita que en la red cúbica centrada en las caras de la austenita.…”

Section: Discussionunclassified

Simulación del efecto de la irradiación mediante el trabajado en frío y los tratamientos térmicos en dos aceros inoxidables austeníticos

Diego¹,

Castaño²,

Hernández³

1998

REVMETAL

View full text Add to dashboard Cite

Simulación del efecto de la irradiación mediante el trabajado en frío y los tratamientos térmicos en dos aceros inoxidables austeníticosResumen En este trabajo se simulan los efectos que produce la irradiación, pérdida de ductilidad y segregación de impurezas en borde de grano, mediante trabajado en frío y posterior tratamiento térmico, para aceros inoxidables austeníticos AISI 304. Mediante ensayos de velocidad de extensión constante y en medios similares a los de los reactores de agua en ebullición se intenta relacionar la susceptibilidad a la corrosión bajo tensión con la susceptibilidad a la corrosión asistida por irradiación.

show abstract

“…Molybdenum is added to improve corrosion resistance of steel, while Ni is added to stabilize austenite (γ) at elevated temperatures while avoiding the formation of δ-ferrite. Levels of carbon (C) reduced to 0.01% (w/w) contribute to improve the weldability [9,10,[12][13][14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Corrosion resistance of rolled and rerolled super martensitic steel in media containing chlorides and hydrogen sulfide

Soares

Lins

2017

Matéria (Rio J.)

View full text Add to dashboard Cite

In the oil and gas industry, super matensitic steels have been used primarily in the manufacture of seamless steel pipe for use in drilling oil and gas. The objective of this work is to evaluate the corrosion resistance of rolled and rerolled super martensitic steels in electrolytes of aqueous solution of NaCl 35 g/L, and aqueous solution of NaCl 120 g/L, sodium acetate 0.4 g/L, with pH 4.5 (standard solution), saturated and unsaturated with H 2 S, simulating the service conditions of petroleum industry in the pre-salt operation. For this evaluation, the electrochemical tests used are electrochemical impedance spectroscopy (EIS) and cyclic polarization test. The characterization techniques used are optical microscopy, scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The effect of H 2 S saturation of the solutions studied on the corrosion resistance of steels was detrimental. The super martensitic steel in the rerolled condition showed a higher corrosion resistance than the rolled steel in an aqueous solution of 35 g/L NaCl and in a standard solution saturated with H 2 S. In the 35 g/L NaCl aqueous solution saturated with H 2 S and in the standard solution, the rolled steel showed a higher corrosion resistance than the rerolled steel. In an aqueous solution of 35 g/L NaCl, the rolled and rerolled steels showed pitting diameter of 140μm and 100μm, respectively.

show abstract

The effects of deformation induced martensite on the sensitization of austenitic stainless steels

Cited by 79 publications

References 6 publications

Reverse transformation of deformation-induced martensite in austenitic stainless steel studied by positron annihilation

Reverse transformation of deformation-induced martensite in austenitic stainless steel studied by positron annihilation

Simulación del efecto de la irradiación mediante el trabajado en frío y los tratamientos térmicos en dos aceros inoxidables austeníticos

Corrosion resistance of rolled and rerolled super martensitic steel in media containing chlorides and hydrogen sulfide

Contact Info

Product

Resources

About