6061 aluminum alloy is an Al Mg Si series heat treatable strengthened deformed aluminum alloy, with magnesium (Mg) and silicon (Si) as the main alloying elements. Its characteristics are moderate strength, good corrosion resistance, and excellent processing performance, widely used in industries such as construction, transportation, and electronics. 6063 aluminum alloy is a typical representative of the 6 series alloys (Al Mg Si), with particularly excellent extrusiveness and weldability. Its characteristics are high plasticity and corrosion resistance under pressure processing temperature speed conditions; No stress corrosion tendency; During welding, its corrosion resistance does not actually decrease.

Magnesium alloy is an alloy composed of magnesium as the basis and other elements added. Its characteristics are: low density (about 1.8g/cm3), high strength, large elastic modulus, good shock absorption, greater ability to withstand impact loads than aluminum alloy, good electrical and thermal conductivity, good processability, poor corrosion resistance, easy oxidation and combustion, and poor heat resistance. The main alloying elements include aluminum, zinc, manganese, cerium, thorium, and a small amount of zirconium or cadmium. Magnesium alloys are widely used in portable equipment and the automotive industry to achieve lightweight goals.

Carbon fiber board is a new type of composite reinforcement material formed by extrusion and heat curing treatment, with carbon fiber as the reinforcing material and epoxy resin as the matrix material. Carbon fiber provides high strength and stiffness, while resin fills the gaps between carbon fibers, providing protection and fixing them. The density of carbon fiber board is only one-fifth of that of steel, but its tensile strength exceeds 3500MPa, which is several times that of steel; It can effectively resist the erosion of chemical substances such as acids, bases, and salts, and is suitable for fields such as chemical engineering and marine engineering.

Tensile test specimen is a standard specimen used for testing the mechanical properties of materials, which determines the strength, plasticity and other indicators of materials through uniaxial tensile testing. Grinding → Polishing → Microscopic Observation and Analysis

In the fields of aerospace, biomedicine, and manufacturing, titanium alloys are known as "space metals" and "ocean metals" due to their strength to weight ratio, excellent corrosion resistance, and biocompatibility. The macroscopic properties of materials are rooted in their microstructure, and accurately revealing the microstructure of TA1 pure titanium and TC4 titanium alloy is the key to evaluating their process quality and predicting their service performance. In this issue, we will delve into the challenges and solutions of these two typical titanium materials in metallographic sampling.

The density of carbon fiber board is only one-fifth of that of steel, but its tensile strength exceeds 3500MPa, which is several times that of steel. It can effectively resist the erosion of chemical substances such as acid, alkali, and salt, and is suitable for fields such as chemical engineering and marine engineering. The strength, modulus, and durability of carbon fiber board fundamentally depend on the arrangement, distribution, diameter, and bonding state of internal fibers with the resin matrix. How to clearly "see" and accurately measure these microstructures has become an unavoidable issue in material research and development, quality control, and failure analysis.