this study was conducted in order to investigate the influence of plastic deformation on the transformation of retained austenite in a trip steel with a high content of al and a low content of si. to the aim, appropriate treatments were used to produce the starting material (trip steel). the microstructure of the obtained steel was composed of bainite and phases including ferrite and retained a...

The role of microstructural damage in controlling the edge stretchability of Complex-Phase (CP) and Dual-Phase (DP) steels was evaluated using hole tension experiments. The experiments considered a tensile specimen with a hole at the center of specimen that is either sheared (sheared edge condition) or drilled and then reamed (reamed edge condition). The damage mechanism and accumulation in the...

The effect of heat treatment and alloying elements of copper and tin on the microstructure and mechanical properties of austempered ductile cast iron alloys is investigated. The austenitizing temperature of 890°C, the isothermal transformation (austempering) temperatures of 285, 335 and 375°C, and austempering times of 15, 30, 75 and 150 minutes are studied. The alloying elements of copper and ...

This laboratory study aimed to reveal the inner connects between microstructure and corrosion properties of a RE microalloyed ultra-thin cast strip (UCS) steel. The mainly consisted homogeneous polygonal ferrite (PF) with small amount pearlite (P), while adding multiple alloying elements led appearance granular bainite (GB) bainitic (BF). strongly promoted homogenization refinement by segregati...

In this study, structural and crystallographic properties of phase transformations in Fe–Mn– Mo–Si (Mn = 15.14 wt.% 18.45 wt.%) alloys were investigated. The effects heat treatment temperature on microstructure investigated by Scanning Electron Microscopy (SEM) Metallurgical (MM). addition to this, revealed using Transmission (TEM) X–Ray Diffraction (XRD) methods. the samples subjected at 750 ...

An experiment is presented which succeeds for the first time in stimulating the formation of coarse plates of bainite by the coalescence of identically oriented individual platelets. Transformation under the influence of a tensile stress dramatically promotes the formation of the coalesced bainite by increasing the probability of growing parallel platelets in close proximity. Whereas the coarse...

A medium-carbon Si–Mn–Ni–Cr–Mo alloyed (300M) steel was austempered for various short periods at its martensite-starting temperature of 285 °C to seek improved sliding wear resistance as compared the traditional martensitic and bainitic steels. Reciprocating tests were performed against a WC/Co ball counterpart constant load 49 N. The samples characterised using field emission SEM, XRD hardness...

The growth and propagation behavior of austenite-to-bainite isothermal transformation in laser-cladded, Si-rich, and Fe-based coatings is investigated. The crystallographic features, orientation relationship at different isothermal temperatures, and the morphology of the nanostructured bainite are determined. The Nishiyama-Wassermann type orientation relationship is observed at a high temperatu...