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Full-Text Articles in Metallurgy
Chemistry, Design, And Processing Of Two-Stage Trip Steel, Daniel M. Field
Chemistry, Design, And Processing Of Two-Stage Trip Steel, Daniel M. Field
Doctoral Dissertations
"A regular solution model was developed to calculate the chemical driving force for α-martensite formation, ΔGλ→ αChem. A model for the strain energy, ΔGλ→αstr, was formulated utilizing the Young’s modulus (E), lattice misfit squared (δ²), and molar volume (Ω) which opposed the chemical driving force for α-martensite formation. The MαS was determined at a temperature at which ΔGλ→αChem + ΔGλ→αstr = 0. In conjunction with a previously developed ε-martensite model, a means of predicting the volume fraction of λ-austenite was determined; and it was shown that for values …
Thermodynamics And Crystallography Of The Γ→Ε→Α' Transformation In Femnalsic Steels, Scott Thomas Pisarik
Thermodynamics And Crystallography Of The Γ→Ε→Α' Transformation In Femnalsic Steels, Scott Thomas Pisarik
Masters Theses
"FeMnAlSiC steels which exhibit two-stage transformation induced plasticity (TRIP) behavior characterized by the γ→ε→α' dual stage martensitic transformation promise to take a leading role in the development of 3rd generation advanced high strength steels. The crystallographic orientation relationship of the γ→α' and γ→ε athermal martensitic transformations in these steels has been determined as the Kurdjumov-Sachs and the Shoji-Nishiyama, respectively. Six crystallographic variants of α-martensite consisting of three twin-related variant pairs were observed in ε- bands. A planar parallelism of {0001}ε || {110}α' and a directional relation of α' lying within 1⁰ of ε existed for these variants. Two regular solution …