Abstract Simulations of laser-based directed energy deposition metals have received increasing interest aimed at reducing the experimental effort to select proper processing condition for repair or overhaul actual components. One main issues be addressed is evaluation residual stress, which may lead part failure under nominal loading. In this frame and specifically relating aluminum alloys, few...

This paper investigates the influence of drilling process on an aluminum 2024-T351 part in terms surface integrity and fatigue strength. Two processes (axial; orbital) are considered. The is studied through roughness measurements, microstructure hardening analysis residual stress assessment. An innovative Hole Opening Comparative Technique set up to assess state. Fatigue tests conducted with op...

The strain-specific modifier Ssm1 is responsible for the straindependent methylation of particular E. coli gpt-containing transgenic sequences.Here,we identifySsm1as theKRAB-zinc finger (ZF) gene 2610305D13Rik located ondistal chromosome4.Ssm1b is amember of a gene family with an unusual array of three ZFs. Ssm1 family members in C57BL/6 (B6) and DBA/2 (D2) mice have various amino acid changes ...

To improve resolution of in-situ measurement crack closure and opening in fatigue, potential drop (PD) technique has been further developed to measure thousands times through each load cycle with high precision. The results are interpreted physical phenomena like strain, Poisson’s effect, piezo-resistivity, plasticity, growth. Application the fatigue growth tests on aluminum 2024-T3 CCT specime...

Cyclic stress strain curves (CSSC) response of Al-2024 Annealed condition was conducted under symmetric tension-compression at room temperature and constant frequency, using a servo-hydraulic testing machine, to study the effect of cooling rate on cyclic stress strain curves (CSSC) response. The fatigue response of Al-2024 alloy was evaluated macroscopically in terms of cyclic stress strain res...