This study aimed to identify the optimal combination of wavelength and laser pulse density achieve pressure that can induce maximum compressive residual stress at subsurface microalloyed steel. For this, shock peening without coating (LSPwC) was performed on steel samples fundamental (1064 nm) with densities 3, 6, 9, 12 GW/cm2 second harmonic (532 9 GW/cm2. The distributions were studied a dept...

In the present study, effect of Niobium (Nb) on hydrogen embrittlement resistance Quenched and Partitioning (Q&P) steel is investigated. For this purpose, uptake level its impact mechanical properties a Nb-free 0.024 wt% Nb Q&P are thoroughly analysed. The trapping capacity evaluated via thermal desorption spectroscopy (TDS). In-depth analysis kinetics at different heating rates allows identifi...

  Abstract   Recovery and recrystallization phenomena and effects of microalloying elements on these phenomena are of great importance in designing thermomechanical processes of microalloyed steels. Thus, understanding and modeling of microstructure evolution during hot deformation leads to optimize the processing conditions and to improve the product properties.   In this study, finite element...

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 general, the strength-to-weight ratio is a marked property of high- strength low-alloy steel. The coiling temperature an important process parameter in control and improvement final microstructure mechanical properties. this work, effect deformation on properties high Ti- V microalloyed HSLA steels were investigated using Gleeble 1500 TM thermomechanical processing simulator. samples austeni...

In this study, a multi-element microalloyed GCr15Si1MoNbV bainitic bearing steel was designed by adding trace amounts of Nb and V. The bainite/martensite/retained austenite/undissolved carbide multiphase with short heat-treated cycle remarkable comprehensive mechanical properties prepared via low-temperature austempering, which compared traditional quenched tempered martensitic microstructure. ...