Microstructure and solute distribution have a significant impact on the mechanical properties of wire arc additive manufacturing (WAAM) deposits. In this study, multiscale model, consisting macroscopic finite element (FE) model microscopic phase field (PF) was used to predict 2319 Al alloy microstructure evolution with epitaxial growth. Temperature fields, corresponding temperature gradient und...

Microstructure-sensitive fatigue crack growth in 304 metastable austenitic stainless steel containing nanotwin bundles was studied using a miniature compact tension specimen combined with post-fatigue metallographic examinations. The single-variant nanotwinned specimens exhibited high resistance compared to the coarse-grained without bundles, regardless of lamellar orientation. In martensite va...

Although electrical fires constitute the greatest percentage of the main causes of building fires, the critical evidence used by fire investigators to identify electrical fires is not always convincing to the general public. In this study, we scrutinized the microstructures of fire-causing copper wires and simulated the external environmental conditions required for the formation of fire-causin...

Aiming at the mechanical testing of three-dimensional specimens with feature size of centimeter level, a miniaturized tensile platform, which presents compatibility with scanning electron microscope (SEM) and metallographic microscope, was designed and built. The platform could accurately evaluate the parameters such as elastic modulus, elongation and yield limit, etc. The calibration experimen...

The present study evaluates the effect of boron additions on tribological performance CoCrMo alloys. alloys were prepared with ranging from 0.06 to 1 wt%. materials characterized using metallographic techniques, scanning electronic microscopy, and roughness hardness tests. Tribological evaluation was made by means ball-on-disc tests for sliding distances 4, 8 12 km. samples in as-cast condition...

Abstract In this study, the eutectic temperature and latent heat of Al–Si- Zn–Al–Mg-based alloys were determined using differential thermal analysis (DTA) scanning calorimetry measurements in order to identify for storage ranges 450–550 300–350°C. First, compositions Al–Si–Cu–Mg–Zn Zn–Al–Mg–Sn identified electron microscopy with energy-dispersive X-ray spectroscopy DTA two steps. second step, m...