Results 331 to 340 of about 102,036 (378)

Reverse transformation mechanism of martensite to austenite in a metastable austenitic alloy

Materials Science and Engineering: A, 2009
The reverse transformation of martensite to austenite in a metastable austenitic alloy was investigated during continuous heating followed by isothermal holding. The diffusionless reverse transformation occurred irrespective of heating rate during continuous heating, resulting in lath-shaped austenite with high dislocation density.
Seok-Jae Lee, Yong Min Park, Young Kook Lee   +2 more
openaire   +2 more sources

Effect of hydrogen on austenite to martensite transformation in an austenitic stainless steel [PDF]

Journal of Materials Science Letters, 1987
Effet de l'hydrogene sur la temperature de transformation. Le chargement en hydrogene se fait selon une nouvelle procedure a basse pression, de telle facon que la microstructure ne soit pas affectee durant l'introduction du gaz. On montre que l'hydrogene n'a aucun effet significatif sur la temperature de transformation M S et sur la quantite de ...
openaire   +1 more source

On the austenite stability of cryogenic Ni steels: microstructural effects: a review

Journal of Materials Science, 2021
W. X. Zhang, Y. Z. Chen, Y. Cong, Y. H. Liu, F. Liu   +4 more
semanticscholar   +1 more source

Mechanical stabilisation of austenite

Materials Science and Technology, 2006
A theory has been developed for the mechanical stabilisation of plastically deformed austenite by balancing the force which drives the transformation interface against the resistance from dislocation debris in the austenite. The work has been used to explain why very large strains are required to mechanically stabilise certain stainless steels, and ...
H. K. D. H. Bhadeshia, H.-S. Wang, S. Chatterjee, Jer-Ren Yang   +3 more
openaire   +2 more sources

Effect of Austenite Stability on Pack Aluminizing of Austenitic Stainless Steels

JOM, 2014
Aluminide coatings were applied to the surfaces of several austenitic stainless steels—UNS S30300, S30400, S30900, S31000, and S31600 (Type 303, 304, 309, 310, and 316)—by the halide activated pack cementation process. The coating compositions, microstructures, and hardness were determined for the different steels coated at 850°C for 25 h.
Vilupanur A. Ravi, Armando Coronado, Christopher Lopez, Obed Villalpando, Sutine Sujittosakul, Armen Kvryan, Shahan Kasnakjian   +6 more
openaire   +2 more sources

The decomposition of austenite

2004
The final microstructures of steels, and consequently their service properties, are determined principally by solid state transformations. The present chapter discusses the essential features of the mechanisms involved.
openaire   +2 more sources

The diffusion of carbon in austenite

Acta Metallurgica, 1988
Abstract A calculation of the variation with concentration of the diffusivity of carbon in austenite is given. Absolute rate theory is used to calculate the intrinsic jumping frequency of C-atoms located in differing atomic configurations in the austenite lattice.
C. Ko, Rex B. McLellan
openaire   +2 more sources

Stabilization of Austenite by Hydrogen

Nature, 1960
ATTEMPTS to study the possible effects of hydrogen on the austentite–martensite transformation in steels have always to reckon with the difficulty of retaining adequate amounts of hydrogen in them, regardless of the amounts initially present. The austenitizing and heat treatment of steels are generally carried out at virtually atmospheric pressures or ...
C. Dasarathy, E. G. Ramachandran
openaire   +2 more sources

The nature of expanded austenite

Surface and Coatings Technology, 2000
Abstract This paper attempts to reduce some of the confusion that exists over the nature of the nitrogen-rich layer produced by nitriding austenitic stainless steel at temperatures below 500°C. Cross-sectional transmission electron microscopy shows that the modified layer is dominated by a cubic phase with considerable expansion of the austenite ...
M.P Fewell, J.M Priest, David R. G. Mitchell, Ken Short, G.A. Collins   +4 more
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The distribution of boron in austenite

Metallurgical Transactions, 1972
The partitioning of boron between grain boundary and austenite matrix sites in steel has been examined by the use of boron autoradiography. Results show that inalloyscontainingO.0037at.pctB and 0.68 at. pct C, boron segregates to the austenite grain boundary with a binding energy of 9.6 ±1.0 kcal/mole.
J. E. Morral, W. F. Jandeska
openaire   +2 more sources