Date palm seeds waste in Algeria: Mechanical characterization of epoxy/date palm seed composites

Sat, 21 Dec 2024 00:00:00 +0000

In this paper a literature review and an experimental study were presented in order to investigate the use date palm seeds waste in the elaboration of composite materials. The literature review showed that Algeria is the fourth world’s largest date producer country. From 2008 to 2018, a growth rate of 50% is recorded in the date production in Algeria. An approach is proposed to estimate the annual quantity of date palm seeds waste obtained in Algeria from soft and dry dates, intended for industrial processing. In the experimental part, the mechanical properties of the composite were investigated using an epoxy matrix and five weight fractions of date palm seeds (0 to 40%). A comparison study is presented between tensile and three points bending results and those available from the literature on a similar composite. Beyond the usual discussions in the literature, the increase in the reinforcement weight fraction in the composite allowed observing and discussing two different behaviours: (i) Low weight fraction (10 and 20% of reinforcement), showed a decrease of the flexural modulus and maximum flexural stress. This is due to the small size of the particles in the composite ultimately leading to a weak particle to particle contact. (ii) When the reinforcement weight fraction increases (30 and 40%), more loads are transferred from the matrix to the reinforcement, known for its high rigidity. In this case, flexural modulus begging to increase and higher values, than that of the matrix, can be obtained for 40% of reinforcement.

Evolution of recrystallization in cold rolled and annealed copper: A texture analysis study

Ghania Benchabane, Hiba Azzeddine, Djamel Bradai, Zakaria Boumerzoug — Sat, 21 Dec 2024 00:00:00 +0000

This paper presents a texture analysis study of a cold rolled copper and annealed copper at 450°C for 1 min, 30 min and 100 h. Incomplete poles figures of the studied samples were collected via X-ray diffraction. The experimental data were analyzed after corrections using two methods namely Harmonic and Arbitrarily Defined Cells (ADC). The texture characteristics investigated through orientation distribution function enabled to determine the volume fraction of the prominent texture components. A comparison between results obtained by the two methods shows that the recalculated pole figures and the volume fraction of texture components obtained by the Harmonic and ADC are close. The texture evolution of the cold rolled copper during annealing show that the sharpness of the deformation texture decreased during annealing leading to a dispersed texture in fully recrystallized state (30 min of annealing). The texture after the process of grain growth (100 h annealing) was isotropic and less dispersed compared to the fully recrystallized state.

Journal of Composite and Advance Materials

Date palm seeds waste in Algeria: Mechanical characterization of epoxy/date palm seed composites

Evolution of recrystallization in cold rolled and annealed copper: A texture analysis study