Video summary

Tensile Testing of Round Specimen in High Temperature - Tinius Olsen

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Summary of “Tensile Testing of Round Specimen in High Temperature - Tinius Olsen”

This video demonstrates the setup and operation of the Tinius Olsen 300SL universal testing machine (UTM) configured for high-temperature tensile testing of round specimens. It highlights the machine’s features, methodology for conducting tests, and software capabilities.

Main Ideas and Concepts

Machine Setup and Features

  • The 300SL machine is equipped with a high-temperature furnace and an adjustable crosshead extended by a 3-foot addition to accommodate the furnace and specimen.
  • Sacrificial studs and adapters allow easy switching of tooling for different test types (high temperature, room temperature, flat specimens).
  • The machine can apply loads ranging from 120 pounds up to 60,000 pounds (300 kN capacity).
  • Multiple furnaces can be mounted simultaneously, allowing pre-soaking of specimens while other tests run, improving testing efficiency.

Specimen and Testing

  • A 252-threaded round specimen is used for demonstration.
  • The furnace slides into place around the specimen and adapters.
  • The specimen is soaked at the target temperature (e.g., half an hour) before testing.
  • The test automatically starts once the temperature stabilizes and reaches the set point.
  • The machine applies tensile load until specimen failure.
  • An extensometer designed for high temperatures is used to measure strain; it can be removed after yield to avoid damage during failure.

Machine Design Advantages

  • Load cell is isolated from heat (located in the piston and cylinder), preventing heat damage and ensuring accurate, repeatable load readings.
  • Low-pressure hydraulic system reduces heat buildup and avoids issues common in high-pressure systems.
  • The machine is versatile, capable of performing tensile, compression, bend, flex, and peel tests.
  • The system complies with ASTM, ISO, British standards, and is CE marked.

Software and Data Management

  • Integrated software controls multiple machines and test types from one interface.
  • Supports multiple furnaces and plots both stress-strain curves and temperature vs. time graphs.
  • Test data can be stored, recalled, and replayed.
  • Network capabilities allow remote access by managers or other users for reviewing and exporting test results.
  • Software automates test start upon reaching temperature and alerts for extensometer removal after yield.

Testing Workflow

  1. Pre-soak specimen in furnace.
  2. Slide furnace into place on the machine.
  3. Let temperature stabilize.
  4. Automatically start tensile test.
  5. Monitor stress-strain curve.
  6. Remove extensometer at yield.
  7. Continue test to failure.
  8. Remove broken specimen and take measurements.
  9. Swap in next furnace and specimen to continue testing without downtime.

Methodology / Instructions for High-Temperature Tensile Testing on 300SL

  • Extend the crosshead to accommodate furnace and specimen.
  • Attach sacrificial studs and adapters for specimen mounting.
  • Pre-soak specimen in furnace at desired temperature (e.g., 30 minutes).
  • Slide furnace into position around specimen and adapters.
  • Use software to set temperature set point and test parameters.
  • Wait for furnace temperature to stabilize and reach set point.
  • Automatically start tensile loading through software.
  • Use high-temperature extensometer to measure strain until yield point.
  • Remove extensometer after yield to prevent damage.
  • Continue loading specimen until failure.
  • Remove furnace and broken specimen; take required measurements.
  • Insert next furnace with pre-soaked specimen to maintain testing throughput.

Speakers / Sources Featured

  • Primary Speaker: Unnamed demonstrator/operator from Tinius Olsen explaining the machine setup, features, and testing process.

This summary captures the key technical details, operational steps, and advantages of using the Tinius Olsen 300SL for high-temperature tensile testing of round specimens.

Original video