The formation and dissolution of residual ferrite in ASME Grade 91 steel plates S. Kobayashi , K. Sawada , T. Hara , H. Kushima , K. Kimura Materials Science
(PDF) Formation kinetics of austenite in pearlitic ductile The formation kinetics of austenite complies with the Avrami equation, in which the parameter (n) ranges from 4.71 to 4.99. it was controlled by the dissolution of residual ferrite to
In this study, austenite formation from hot-rolled (HR) and cold-rolled (CR) ferrite-pearlite structures in a plain low-carbon steel was investigated using dilation data and microstructural analysis. Different stages of microstructural evolution during heating of the HR and CR samples were investigated. These stages include austenite formation from pearlite colonies, ferrite-to-austenite
Effect of chemical composition and ferrite content on These modes of ferrite formation can be used to explain observed ferritemore » Variations in ferrite content within the weld were also related to weld metal composition, ferrite morphology, and dissolution of ferrite resulting from thermal cycles during subsequent weld passes.
Effect of initial microstructure on austenite formation Austenite formation occurred in two steps:(1) carbide dissolution and precipitation and (2) transformation of residual ferrite to austenite. Dilatometric analysis was used to determine the critical temperatures of austenite formation and continuous heating transformation diagrams for heating rates ranging from 0.03°Cs-1 to 0.67°Cs-1. The austenite volume fraction was fitted using the Johnson
Austenite formation occurred in two steps:(1) carbide dissolution and precipitation and (2) transformation of residual ferrite to austenite. Dilatometric analysis was used to determine the critical temperatures of austenite formation and continuous heating transformation diagrams for heating rates ranging from 0.03°Cs1 to 0.67°Cs1.
Ferrite morphology and variations in ferrite content in These modes of ferrite formation can be used to explain observed ferrite morphologies in austenitic stainless steel welds. Variations in ferrite content within the weld were related to weld metal composition, ferrite morphology, and dissolution of ferrite resulting
Formation of delta ferrite in 9 wt.% Cr steel investigated Mayr, P. et al. Formation of Delta Ferrite in 9 Wt Pct Cr Steel Investigated by In-Situ X-Ray Diffraction Using Synchrotron Radiation. Metallurgical and Materials Transactions A 41.10 (2010):24622465.
2. Formation of ferrite When welded, 304 steel exhibit a wide range of microstructures, solidification behaviors and resulting ferrite morphologies [26,40]. As welded microstructures contain mainly the skeletal ferrite morphology, some regions solidified as primary ferrite while other regions solidified as primary austenite, in which case the
In-situ monitoring of alloy dissolution and residual film T1 - In-situ monitoring of alloy dissolution and residual film formation during the pretreatment of al-alloy AA2024-T3. AU - Gharbi, Oumaima. AU - Birbilis, Nick. AU - Ogle, Kevin. PY - 2016. Y1 - 2016. N2 - The dissolution of intermetallic phases in AA 2024-T3 aluminum alloy sheet was investigated during a coating pretreatment sequence.
Modeling the ferrite-to-austenite transformation in the Modeling the ferrite-to-austenite transformation in the heat-affected zone of stainless steel multi-pass welds
(2007). Modelling of residual stresses and property distributions in friction stir welds of aluminium alloy 6061-T6. Science and Technology of Welding and
Residual ferrite formation in 12CrODS steels - NASA/ADSThis ferrite consists of both equilibrium ferrite and a metastable residual ferrite. It was shown that the fraction of the equilibrium ferrite is predictable by computed phase diagram and formation of the residual ferrite was successfully evaluated through pinning of
Reverse phase transformation from to in 9Cr-ODS The process of residual ferrite formation and resultant high-temperature strengthening in 9Cr-ODS ferritic steel was investigated by TEM observation, dilatometric measurement and thermodynamic analysis. Formation of the residual ferrite is dominated by a balance between pinning of - interfaces and the - reverse transformation, and - reverse transformation is affected by dissolution
Furthermore, hot deformation could also strongly promote the formation of acicular ferrite, that is, the temperature zone of acicular ferrite transformation was enlarged from 400600 °C in the
Twinned formation in weld metal of titanium bearing nano Furthermore, hot deformation could also strongly promote the formation of acicular ferrite, that is, the temperature zone of acicular ferrite transformation was enlarged from 400600 °C in the Formation of residual ferrite in 9Cr-ODS ferritic steels Jun 25, 2010 · On the basis of the above discussion, the process of the formation of the residual -ferrite is schematically represented in Fig. 8. In the case of the FeCr0.13C2W0.2Ti system without Y 2 O 3 , the -phase exhibited nucleation and growth at A C1 point (850 °C, from Fig. 4 ) and the reverse transformation of the -phase to the