Zona pellucida (ZP) hardening (resistance to proteolysis) has been classically identified as a post-fertilization event that contributes to the block to polyspermy. Di-(N-succinimidyl)-3,3'-dithiodipropionate (DSP), a permeable amine-reactive cross-linker, was recently shown to induce pre-fertilization ZP hardening and to improve porcine IVF productivity. The objectives of this study were to in...

Fracture at sheared edges upon stretch flanging is a severe problem for ultrahigh-strength steel (UHSS). This study was focused on the improvement of flangeability by heat treatment edge UHSS samples. The materials studied were dual-phase and full martensite steel. samples pierced with 10 mmΦ holes then heat-treated whole-area or partial-area heating. heated tested hole expansion test to determ...

In this investigation of AISI 1045 steel are tested in two stages. the first stage samples, induction boriding and hardening heat treatment typically 800 °C, 900 1000 1100 1200 °C applied over course seconds. Internal strains maybe mitigated using a 30 min tempering at temperature ranges 300 500 °Cand 700 °C. After that samples subjected to hardening, microhardness tensile strength according AS...

A thorough investigation has been carried out on the Al-12Si-1Mg-1Cu-1Ni automotive alloy considering different properties, specially mechanical properties associated with true stress and strain Zr addition of trace amount. commercially available piston is melted to produce alloy, amount added make another. The base along had applied homogenization, solution treatment, quenching, ageing in orde...