What is the dwell time for a thermal shock test?

Two Boxes Air-cooled Hot and Cold Thermal Testing ...

The dwell time in a thermal shock test refers to the duration that the test specimen spends at each extreme temperature (high or low) during the test cycle. It is the period during which the specimen is allowed to stabilize at the target temperature before being subjected to the rapid temperature change.

The dwell time can vary depending on the specific test requirements, industry standards, or the nature of the product being tested. It is typically defined in the test procedure or specification provided by the testing organization or standard.

The dwell time can range from a few minutes to several hours, depending on factors such as the size and thermal conductivity of the specimen, the desired level of stress or exposure, and the purpose of the test. The dwell time is usually determined to ensure that the specimen reaches thermal equilibrium at each extreme temperature before undergoing the rapid transition to the opposite extreme.

It's important to follow the specified dwell time in the test procedure to ensure consistency and comparability of results between different tests and laboratories. Deviating from the recommended dwell time may affect the test outcomes and the interpretation of the specimen's performance under thermal shock conditions.