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In the oil and gas industry, the quality of storage tanks and transportation pipelines is critical to the maintenance of the fuel integrity, and leaks due to problems with thease materials will directly threaten public safety and the environment. Fracture mechanics and fatigue testings of transported pipes and storage tanks are helpful to understand their defects. Fracture Mechanics reveal the ability of materials to resist stress in the presence of flaws (such as small pores, inclusions, or micro-cracks), which allows us to conside the inevitable flaws in the design and selection of materials. The fatigue or failure of a material is due to repeated stresses, which may form cracks that will grow to be large enough to cause fracture. Fatigue can result from cyclical application of tension and compression. The fatigue study can accurately estimate the materials' fatigue life and ensures that the components do not fatigue during the service period.
Alfa Chemistry's experts have years of experience in fracture mechanics and fatigue testing. Alfa Chemistry is equipped with advanced equipment for fracture mechanics and fatigue testing. We have professional responsible staffs to conduct fracture mechanics and fatigue testing for you. For more detail information and more customized solution, please do not hesitate to contract us. We will be at your service all the time.
Alfa Chemistry's capabilities include but not limited to:
Fracture Mechanics Testing
➢ Surface cracks and penetrating cracks of materials ➢ Low stress brittle fracture ➢ Crack instability expansion ➢ Fracture toughness tests ➢ COD (CTOD) test ➢ JIC test ➢ Plane strain fracture toughness (KIC) test ➢ Crack growth rate (da/dN) test
Fatigue Testing
➢ High and low cycle fatigue ➢ Constant amplitude fatigue test ➢ Rotational bending fatigue test ➢ Fatigue crack growth rate ➢ Thermal fatigue test ➢ Corrosion fatigue test ➢ Contact fatigue test ➢ High or low temperature fatigue test
Some standard testing methods for fracture mechanics and fatigue testing:
ASTM E399: Standard Test Method for Linear-Elastic Plane-Strain Fracture Toughness KIc of Metallic Materials
ASTM E647: Standard Test Method for Measurement of Fatigue Crack Growth Rates(da/dN)
ASTM E1820: Standard Test Method for Measurement of Fracture Toughness
ASTM E1921: Standard Test Method for Determination of Reference Temperature, To, for Ferritic Steels in the Transition Range
ISO 6892: Metallic materials -- Tensile testing -- Part 2: Method of test at elevated temperature