We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Mechanical Spectroscopy of Thermal Stress Relaxation in Aluminium Alloys Reinforced with Short Alumina Fibres
AI summary Read the abstract
The mechanical behavior of aluminum composites reinforced with short alumina fibers was studied under thermal cycling using mechanical spectroscopy, revealing a loss peak during cooling that reflects thermal stress relaxation at matrix-fiber interfaces. The peak height increases with fiber volume fraction, providing a sensitive measure of interfacial stress state in metal matrix composites.
The mechanical behaviour under low temperature thermal cycling of aluminium-based composites reinforced with short Al2O3 SAFFIL fibres has been investigated by mechanical spectroscopy (mechanical loss and elastic shear modulus measurements). A mechanical loss maximum has been observed during cooling which originates in the relaxation of thermal stresses at the interfaces due to the differential thermal expansion between matrix and reinforcement. The maximum height increases with the volumetric fibre content. In addition, if the matrix strength is increased by the appropriated choice of alloy and thermal treatment, the maximum diminishes and shifts to lower temperatures. No damage accumulation at the interfaces has been detected during long period thermal cycling in the range 100 to 500 K. A description of the damping behaviour is made in terms of the development of microplastic zones which surround the fibres.
More Papers Like This
Mechanical Spectroscopy of Thermal Stress Relaxation in Aluminium Alloys Reinforced with Short Alumina Fibres
AI summary Read the abstract
Mechanical spectroscopy measurements of aluminum composites reinforced with short alumina fibers under thermal cycling revealed a mechanical loss peak during cooling, attributed to interfacial thermal stress relaxation driven by differential thermal expansion. The peak characteristics provide quantitative information about interfacial stress state and fiber volume effects in metal matrix composites.
An energetic method to evaluate the macro and micro high-cycle fatigue behavior of the aluminum alloy
AI summary Read the abstract
This paper developed an energetic method to rapidly predict both macro- and microfatigue behavior of aluminum alloy in high-cycle fatigue by correlating thermal signal measurements with energy dissipation at the grain scale. The method successfully predicted fatigue strength and the entire fatigue life curve, with microplastic energy dissipation used as an indicator of progressive microstructural damage.
Measurement of Microdeformation for Aluminum Specimen with Large Grain
AI summary Read the abstract
Laser-based optical measurement was used to analyze the non-uniform microdeformation of aluminum specimens with large grains, revealing high shear strains at grain boundaries during slip. The experimental results provide direct evidence supporting theories of microplastic deformation at grain boundaries in coarse-grained metals.
Research digests by email
When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.