A New Kinetic Mode During the Austenite-to-Ferrite Transformation in Fe-Mn and Fe-Mn-Mo Alloys

来源 :金属学报(英文版) | 被引量 : 0次 | 上传用户:solar_cbc
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
The kinetics of isothermal austenite (γ)-to-ferrite (α) transformation at various temperatures in Fe-2Mn and Fe-2Mn-0.5Mo (wt%) alloys is investigated via dilatometry experiments and phase-field modeling.It was interestingly found that Mo addition has a marginal effect on the transformation kinetics.Besides the well-known partitioning and partitionless transformation modes,a new kinetic mode,in which interface migration is controlled by interfacial diffusion,was identified.The phase-field model with considering interfacial segregation could well predict the transformation kinetics and the kinetic mode transition.
其他文献
Friction stir lap welding was conducted on 2 mm + 2 mm sheets of aluminum alloy 2A12-T4.The plunge depth (PLD) was designed as 2.45-2.58 mm,which was varied in submillimeters as 2.45,2.50,2.53,2.55,and 2.58 mm,and the axial force was recorded in the weldi
The effects of tempering temperatures on the microstructure and mechanical properties of the simulated coarse-grain heataffected zone (CGHAZ) and inter-critical heat-affected zone (ICHAZ) were investigated for a high-strength-high-toughness combination ma
Amorphous Al2O3-reinforced Al composite (am-Al2O3/Al) compacted from ultrafine Al powders for high-temperature usages confronts with drawbacks because crystallization of am-Al2O3 at high temperatures will result in serious strength loss.Aiming at this uns
A new Mg-2.2 wt% Zn alloy containing 1.8 wt% Ca and 0.5 wt% Mn has been developed and subjected to extrusion under different extrusion parameters.The finest (~ 0.48 μm) recrystallized grain structures,containing both nano-sized MgZn2 precipitates and αt-M
At room temperature,crystalline Mg-based alloys,including Mg2Ni,MgNi,REMg12 and La2Mg17,have been proved with weak electrochemical hydrogen storage performances.For improving their electrochemical property,the Mg is partially substituted by Ce in Mg-Ni-ba
In order to study the corrosion resistance of extruded magnesium alloys,the Mg-4Zn-2Gd-0.5Ca alloy was extruded at the speed of 0.01-0.1 mm/s with the temperature of 280-360 ℃ in present study.Hot extrusion results show that the volume fraction of precipi
AlCoCrFeNi is one of the most widely studied alloy systems in the high-entropy alloy (HEA) area due to the interesting microstructure and mechanical properties.In this study,the A1CoCrFeNi alloy was prepared using spark plasma sintering (SPS) with pre-all
The corrosion behaviour of 316L and Alloy 625 was investigated using cyclic polarization,electrochemical impedance spectroscopy,X-ray photoelectron spectroscopy,Auger electron spectroscopy and induced coupled plasma-optical emission spectrometer.The resul
High-entropy alloys (HEAs) are a new class of materials with a potential engineering application,but how to obtain ultrafine or nano-sized crystal structures of HEAs has been a challenge.Here,we first presented an equiatomic CoCrFeNiCu HEA with excellent
A 444-type heat-resistant ferritic stainless steel containing 0.05 wt% Ce (rare earth element) and 2 wt% (Mo + W) was adopted as an experimental material to study the effect of finish rolling temperature on microstructure and texture evolution as well as