01 Tensile Testing
Tensile testing is a common method for evaluating the strength and ductility of materials. It involves placing a specimen in a tensile testing machine and gradually applying pulling force to measure the stress-strain curve. This determines indicators such as yield strength, tensile strength, and elongation. As one of the most widely used mechanical tests, load is slowly applied to both ends of the specimen until it reaches the breaking point. By measuring the resistance to the external load, strength criteria are established; by measuring the plastic deformation after fracture, plasticity criteria are determined. Data from this test identifies key mechanical properties: strength indicators (elastic limit, yield strength, tensile strength) and plasticity indicators (elongation after fracture, reduction of area).
02 Hardness Testing
Hardness testing evaluates a material's resistance to compression and scratching. Common methods include Brinell, Vickers, and Micro-hardness testing. For materials with uniform hardness, the Vickers hardness test allows for a flexible choice of testing force without altering the hardness value.
03 Fracture Toughness Testing
This test evaluates the fracture performance of materials containing cracks. Traditional strength theory suggests materials deform at yield strength and break at tensile strength (Rm). However, materials with cracks may experience brittle fracture at levels below yield strength. Fracture toughness is a performance index based on energy parameters, closely related to the state and depth of internal cracks. Common methods include impact tests (such as impact bending and impact notch tests), which assess toughness by measuring fracture energy.
04 Metallographic Microscopic Analysis
This involves using optical microscopes to observe the microstructure and phase transformations of metal materials. It provides information regarding grain size, crystal structure, phase content, and defects, helping to evaluate the lattice structure and processing effectiveness.
05 Fatigue Life Testing
Fatigue failure refers to the fracture that occurs after a certain number of cycles under alternating stress lower than the tensile strength, often without obvious plastic deformation before the break. This test evaluates the durability of metals under cyclic stress. Common methods include rotating bending fatigue tests, tensile fatigue tests, and vibration fatigue tests.
06 Corrosion Testing
Corrosion testing evaluates the corrosion resistance of metal materials under specific environmental conditions. Common methods include salt spray testing, electrochemical corrosion testing, and immersion tests.
