In the present work, Fe-5Mn-2Al-0.1C (wt.%) and micro-alloyed Fe-5Mn-2Al-0.1C-0.1Nb-0.2V medium Mn steels were processed by a novel flash-austenite-reverse-transformation (ART) annealing. The core-shell Mn-gradient in austenite was observed compositionally characterized at near-atomic scale using atom probe tomography (APT). Compared with conventional ART annealing, flash-ART process doubled fr...

HIV type 1 (HIV-1) specifically uses host cell tRNALys-3 as a primer for reverse transcription. The 3' 18 nucleotides of this tRNA are complementary to a region on the HIV RNA genome known as the primer binding site (PBS). HIV-1 has a strong preference for maintaining a lysine-specific PBS in vivo, and viral genomes with mutated PBS sequences quickly revert to be complementary to tRNALys-3. To ...

A novel processing route comprising double reversion annealing (DRA) was designed for developing bulk nano-grained (NG) structure of an austenitic stainless steel (Type 301LN). The new concept DRA comprised two subsequent intrinsic type processes i.e., times cold reductions (~53% and 63%) followed by fast induction heating (~200 °C/s) short duration at different temperatures (first 690 °C/60s s...

Abstract A medium Mn steel (MMS) was cast by employing a vacuum induction furnace. After that, the hot rolled (HR) in order to achieve final thickness of 1.4 mm. The microstructure sheet found be composed martensite and little amount austenite, Ultimate Tensile Strength (UTS this processing condition close 1600 MPa negligible elongation found. An intercritical annealing (IA) heat treatment appl...

Abstract Austenitic Cr–Ni stainless-type 301LN steel was subjected to a double-reversion annealing (DRA) treatment develop bulk grain-refined microstructures. The tensile properties and formability of the DRA structures were determined by high-speed Erichsen cupping tests at strain rate 1.5 s ?1 (50 mm ) compared with those coarse-grained steel. Detailed microstructural features characterized u...

We study the problem of finding sparse, mean reverting portfolios based on multivariate historical time series. After mapping the optimal portfolio selection problem into a generalized eigenvalue problem, we propose a new optimization approach based on the use of simulated annealing. This new method ensures that the cardinality constraint is automatically satisfied in each step of the optimizat...

Developing medium-Mn steels (MMnS) demands a better understanding of the microstructure evolution during thermo-mechanical treatments (TMTs). This study demonstrates relationship among processing, microstructure, and mechanical properties warm-rolled steel containing 1.5 wt. % Cu Ni. After short-time warm rolling (WR) in an intercritical temperature range, significant quantity (40.6 vol.%) aust...