cryogenic treatment can be used as a supplemental treatment that is performed on some tool steels between quenching and tempering as an effective method for decreasing retained austenite and increasing wear resistance. in this research, the effect of deep cryogenic treatment (dct) on dimensional stability and mechanical properties of 80crmo12 5 tool steel was investigated. the martensitic trans...

This paper traces the historical development of the methods, techniques, and applications related to the measurement of retained austenite by x-ray diffraction from the early 1930s to the present.

Spatially Resolved X-Ray Diffraction (SRXRD) has been used to identify a previously unobserved low temperature ferrite (δ)/austenite(γ) phase transformation in the heat affected zone (HAZ) of 2205 Duplex Stainless Steel (DSS) welds. In this “ferrite dip” transformation, the ferrite transforms to austenite in the weld HAZ at peak temperatures on the order of 750oC. The austenite then re-transfor...

An artificial neural network (ANN) model is developed for the analysis, simulation, and prediction of the austenite reversion in the thermo-mechanical treatment of 304L austenitic stainless steel. The results of the ANN model are in good agreement with the experimental data. The model is used to predict an appropriate annealing condition for austenite reversion through the martensite to austeni...

The metallic phases of meteorites are predominantly composed of Fe with B to 50 wtR Mi. During slow cooling (10-1 to 103°C per million years) be low 500°C three types of phase transformations take place: 1) Fe—Mi mar tensite (m2) decomposition to c2(ferrite) and y(austenite); 2) Decomposition of austenite to a so—called “cloudy border” of a and ; and 3) Partial ordering of 48 to 55 wtR Mi auste...

The influence of nitrogen (0 to 0.27 wtYo) on martensite formation in an experimental low-nickel stainless-steel alloy (Fe-17Cr-7Mn-4Ni) has been investigated. The alloys containing 0.1 wtYo or more nitrogen are fully austenitic at room temperature; those containing less nitrogen consist of a mixture of austenite, martensite and S-ferrite. The alloys containing less than 0.2 wtYo nitrogen are m...

The characteristics of magnetostructural coupling play a crucial role in the magnetic field-driven behaviour of magnetofunctional alloys. The availability of magnetostructural coupling over a broad temperature range is of great significance for scientific and technological purposes. This work demonstrates that strong magnetostrucural coupling can be achieved over a wide temperature range (222 t...

During the summer of 2006, I had the opportunity to participate in an internship through the U.S. Department of Energy (DOE) at Oak Ridge National Laboratory (ORNL). ORNL is the nations largest national laboratory that is funded by the DOE. ORNL is known best for developing the technology for the atomic bomb and was a classified area for many years. Today ORNL’s research spans all areas of scie...

The stress-induced transformation behavior of retained austenite is considered in this work. With the development of transformationinduced plasticity (TRIP) steels this deformation mode is of growing importance. Twinned martensite structures were calculated using the crystallographic theory of martensite. An available work criterion was used to predict the transformation potentials for 16 diffe...