A new medium-entropy Fe65(CoNi)25Cr9·5C0.5 (at.%) alloy was investigated both at room and liquid nitrogen temperatures in the as-cast deformed conditions. The sample obtained by cold rolling until a thickness reduction of 80% had been reached. During testing ?196 °C, cold-rolled program exhibited combination very high strength (?0.2 = 1360 MPa, ?UTS 2070 MPa), good ductility (? 26%) excellent f...

Abstract A novel medium manganese steel with composition Fe–8.3Mn–3.8Al–1.8Si–0.5C–0.06V–0.05Sn was developed and thermomechanically processed through hot rolling intercritical annealing. The possessed a yield strength of 1 GPa, tensile 1.13 GPa ductility 41 pct. In order to study the effect cold after annealing on subsequent properties, further rolled up 20 pct reduction. After rolling, it obs...

Investigations were carried out to study the effects of heat treatment on the mechanical properties of rolled medium carbon steel. The steel was heated to the austenizing temperature of 830C and water quenched; It was reheated to the ferrite – austenite two phase region at a temperature of 745C below the effective Ac3 point. The steel was then rapidly quenched in water and tempered at 480C to p...

The effect of stability austenite (γ) phase on Lüders-like deformation behavior cold-rolled Fe-Ni-Al-C alloys was investigated by digital image correlation (DIC) analysis, magnetic measurements and electron backscatter diffraction (EBSD) analysis. In this study, Fe-23Ni-5.0Al-0.5C (mass%) alloy (23Ni alloy) Fe-25Ni-5.0Al-0.5C (25Ni were used. tensile strength increased the total elongation decr...

In this paper, a fracto-metallographic analysis was performed on the cracked specimens of cold drawn pearlitic steel subjected to fatigue tests. Fatigue cracks are transcollonial and exhibit a preference for fracturing pearlitic lamellae, with non-uniform crack opening displacement values, micro-discontinuities, branchings, bifurcations and frequent local deflections that create microstructural...

In hot rolled products, which are the subject of other presentations here, vanadium has been used for many years in high strength products, often in combination with other microalloying additions such as niobium or titanium. Vanadium can provide important contributions via both precipitation strengthening and ferrite grain refinement (due to austenite conditioning during thermomechanical proces...

A Fe-34.5 wt % Mn-0.04 wt % C ultra-high Mn steel with a fully recrystallised fine-grained structure was produced by cold rolling and subsequent annealing. The steel exhibited excellent cryogenic temperature properties with enhanced work hardening rate, high tensile strength, and high uniform elongation. In order to capture the unique mechanical behaviour, a constitutive model within finite str...

High strengthened steel bar with elongated pearlite was prepared by caliber rolling at room temperature and its hydrogen embrittlement studied. A 0.6%C - 2%Si 0.2%Mn 1%Cr (in mass%) rolled to a reduction of area 88%, resulting in the evolution lamellar structure similar those cold drawn pearlitic steel. Mean spacing 70 nm texture consisted strong fiber direction parallel <110>. The exhibited hi...