Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 8 of 8 for “"isothermal transformation"”.
-
Nucleation of the isothermal martensitic transformation in iron-nickel-manganese alloys
… manganese and 0.02-0.04 percent carbon. The isothermal martensitic transformation in these alloys has been found to occur over a wide temperature range of at least -1960 to -200 C, and the martensitic structure over the entire range is body centered cubic. The incubation period and nucleation …
-
The Thermal Stabilisation of Austenite at Sub-Zero Temperatures
… The complex interactions between martensite transformation and stress have also been discussed in order to assess the feasibility of a stabilisation mechanism controlled by stress-relaxation.<br/>The kinetics of stabilisation have been studied using an electrical resistance technique in two …
-
Mathematical modelling of the onset of transformation from austenite to pearlite under non-continuous cooling conditions
… genesis of final microstructure. For diffusional transformation processes, prediction of this temperature on cooling, until now, relied upon empirical equations which are based on the cooling rate or degree of undercooling. To develop a method that is capable of predicting the onset of …
-
A constitutional study of a dual phase steel containing 12% chromium
… included the detennination of time-temperature-transformation (TTT) diagrams for the transformations between austenite and ferrite and an investigation into the factors controlling these reactions. The austenite decomposition reaction for a high nickel alloy, 3CR12Ni, and the effect of varying …
-
Effects of vanadium microalloying of 1080 steel on pearlite transformation kinetics and microstructural development
The effects of V alloying on the pearlite transformation kinetics and microstructure in 1080 steel were evaluated. Two industrial wire rod steels, 1080 and 1080V with a 0.035 wt pct V addition, were isothermally heat treated using dilatometry to assess pearlite transformation rates. A detailed …
-
Investigation of rolling variables on the structure of steel.
… particularly recrystallised gamma-grain size; isothermal transformation of austenite to ferrite; and the mechanisms governing hot deformation of austenite.Barrelling during the hot upsetting of a solid cylinder arises from the combined effects of interface friction and inhomogeneous …
-
Transformation and toughness of iron-9 percent nickel alloy.
Phase transformation studies have been carried out on VS2241A, Fe-9.14Ni -0.002C alloy. This alloy was chosen because it was expected that the speed of austenite decomposition would be slow enough to allow continuous cooling transformation and isothermal transformation experiments to be carried out …
-
Transformation and precipitation in vanadium treated steels
… of martensite and other structures, the transformation during continuous cooling, the effect of vanadium addition and increasing nitrogen content on the thermo-mechanical processing of austenite, and the transformation of various morphologies of austenite to ferrite. The sites for …