Jan 13, 2021 · As indicated by the tensile test results at room temperature and high temperatures, the strength of the modified sample was improved compared with the unmodified alloy. According to fracture surface analysis, ductile fracture conforms to the fracture characteristic exhibited by the modified alloy at room temperature and high temperatures. High temperature tensile properties of laser-welded high Dec 20, 2016 · High temperature tensile properties can be enhanced significantly by the precipitates in the fusion zone and heat-affected zone after heat treatment. The ultrafine grains and unstable divorced eutectic in the fusion zone of as-welded joints deteriorated the tensile properties at 300 °C.
The tensile fracture surfaces of the chosen material (duplex stainless steel 2304) at both ambient temperature and elevated temperature were examined in a scanning electron microscope (SEM) to provide useful information relating to the specific role of intrinsic microstructural features and microstructural effects on strength, ductility and fracture properties of the candidate steel. Low Temperature Tensile and Fracture Toughness engineering design requires mechanical properties data at or close to the operating temperature (1.8 K). Tensile properties can give indications of brittle behavior but do not provide fracture toughness design data. A previous study  of high purity niobium (RRR250) tensile properties has shown that the ductility of niobium decreases at 4.2 K. TEMPERATURE EFFECT ON THE MECHANICALA 300 0F (149 C) environment is the maximum limit for an extended time service temperature; higher temperatures causing too severe of loss in load carrying capability. The fracture toughness varied very little over the temperature range of -100°F (-730C) to 400°F (204°C).
As tensile testing temperature rises, the strain hardening exponent (n) decreases due to the thermal softening effect. The fracture mode of the alloy transforms from mixture of intergranular and