ISO 12135 Metallic Materials - Combined Test Method for Determining Semi-Static Fracture Toughness

Metal Test Laboratory

ISO 12135 Metallic Materials - Combined Test Method for Determining Semi-Static Fracture Toughness

EUROLAB, with its state-of-the-art accredited laboratories and expert team, provides precise and fast testing services within the scope of ISO 12135 testing. This standard specifies methods for determining fracture toughness in terms of K , δ , J and R.

ISO 12135 Metallic Materials - Combined Test Method for Determining Semi-Static Fracture Toughness

Samples are notched, pre-cracked by fatigue, and tested under gradually increasing displacement. Fracture toughness is determined for individual samples at the onset of ductile crack elongation or after or at the onset of ductile crack instability or unstable crack elongation.

Where cracks grow stably under ductile tearing conditions, a resistance curve is measured that describes fracture toughness as a function of crack elongation.

In some cases in testing ferritic materials, unstable crack elongation can occur with splitting or ductile crack initiation and growth, interrupted by split elongation. Fracture toughness in crack capture is not covered by this document.

The statistical variability of the results is highly dependent on the type of fracture; for example, fracture toughness associated with cleavage fracture in ferritic steels can vary widely.

For applications requiring high reliability, a statistical approach can be used to quantify the variability in fracture toughness in the ductile-brittle transition region, such as given in ASTM E1921. However, it is not the purpose of this document to specify the number of tests to be performed or how the results of the tests will be administered or interpreted.

EUROLAB assists manufacturers with ISO 12135 test compliance. Our test experts, with their professional working mission and principles, provide you, our manufacturers and suppliers, the best service and controlled testing process in our laboratories. Thanks to these services, businesses receive more effective, high-performance and quality testing services and provide safe, fast and uninterrupted service to their customers.

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