The dilatometric and microstructural analysis of the tempering process in Al-rich, medium-Mn steel was performed. The martensite in the analyzed 4% Mn steel had a high resistance to the tempering over 15, 30, and 60 min at 350 °C. An increase in the time from 15 to 60 min led to a higher contraction during tempering but this effect was
Effect of Indirect Transformation of Retained Austenite A modified tempering treatment has been designed in order to avoid the direct transformation of retained austenite (Ar) during tempering of a low-alloy Cr-Mo-V steel. Instead of the direct transformation of Ar into ferrite and M 23 C 6 carbides during conventional tempering at 700 °C, transformation into aggregate of ferrite and cementite has
The evolution of heterogeneous microstructure and mechanical properties of a 12Cr10NiMoTi maraging steel was investigated at different aging temperatures. As the aging temperature increases, more reversed austenite forms with the recovery of martensite matrix. When aging temperature is up to 560 °C, more lath-like reversed austenite coalesces together and leads to the formation of
Effect of aging temperature on the heterogeneous The evolution of heterogeneous microstructure and mechanical properties of a 12Cr10NiMoTi maraging steel was investigated at different aging temperatures. As the aging temperature increases, more reversed austenite forms with the recovery of martensite matrix. When aging temperature is up to 560 °C, more lath-like reversed austenite coalesces together and leads to the formation of
Effect of heat treatment on microstructure and mechanical 1 day ago · Effect of solution treatment on microstructure and mechanical properties 3.3.1. Solution temperature. In general, solution temperature determines the effective grain size and subsequent aging strengthening effect, which eventually influences the mechanical properties of steels.
Fe-0.6C-1.5Si-0.8Mn steel was studied to determine the effect of the microstructure on transformation-induced plasticity (TRIP) of silicon-containing low-alloy steel. A remarkable increase in elongation through TRIP can develop in the steel subjected to the
Effect of thermomechanical cyclic quenching and tempering Thermomechanical cyclic quenching and tempering (TMCT) can strengthen steels through a grain size reduction mechanism. The effect of TMCT on microstructure, mechanical, and electrochemical properties of AISI 1345 steel was investigated. Steel samples heated to 1050°C, rolled, quenched to room temperature, and subjected to various cyclic quenching and tempering heat treatments were named
Effects of alloying elements on microstructural evolution The effects of Cr and/or Mo additions and tempering temperatures on mechanical properties in relation to the microstructural evolution during tempering were investigated in induction-tempered steels. The additions of Cr and/or Mo result in the finer distribution of cementite particles due to the decrease in the coarsening rates of cementite particles above tempering temperature of 400°C
transition temperature between the upper shelf and MS was not affected. The steel sheet containing 38% MA constituents exhibited a normal one-step DBT curve without MS, and a significantly higher transition temperature than the steel sheets containing 0,
Investigation of microstructural evolution and bainite Feb 13, 2020 · The measured Ms and M f (martensite transformation finishing temperature) are 360 °C and 150 °C, respectively. This indicates that all intercritical austenite will transform to martensite during quenching to room temperature at a cooling rate of 50 °C/s. Download :Download high-res image (2MB) Download :Download full-size image; Fig. 3.
Microstructural characteristics of Shengli lignite during Nov 01, 2019 · The microstructural transformation characteristics of Shengli lignite during low-temperature oxidation and promotion effect of iron species were systemic studied. The following conclusions could be drawn. (1) Temperature showed a significant influence on mass change rate of coal samples during low-temperature oxidation.
transformation in super-bainitic microstructure Wencui Xiu, Ying Han, Cheng Liu et al.-Recent citations Investigation on microstructural, mechanical, and electrochemical properties of water, brine quenched and tempered low carbon steel Muhammad Arslan Hafeez et al-Effect of microstructural transformation during tempering on mechanical properties
Microstructure Evolution during Quenching and Tempering This phenomenon was attributed to the effect of thermal strain path on phase transformation during quenching. The through-thickness microstructural gradient remains after tempering.
Study and modelling of microstructural evolutions and Study and modelling of microstructural evolutions 201 During the tempering, recovery occurs in the martensite. The evolution of the dislocation density can be estimated by (Hou and Lu, 1989):
With an HM-100 ultra-high-temperature microscope, microstructural transformation of the laser surface-remelted TiAl was observed in situ during heating to temperatures of 800 °C, 850 °C, 900 °C and 950 °C, and the heating rate of 200 °C/min was adopted; results showed that the higher the heat treatment temperature, the shorter the time for structure change as expected.