High-Temperature Dilatometer | Ultra-High-Temperature Thermal Analysis System up to 2800 °C

L78 RITA – Thermal Expansion, Deformation and Phase Transformation Tester

The L78 RITA thermal expansion, deformation, and phase transformation tester is designed for analyzing phase transformation behavior of materials under rapid heating and cooling conditions. It is suitable for measuring and generating TTT, CHT, and CCT diagrams. The high-speed induction furnace provides heating and cooling rates up to 4000 °C/s and complies with ASTM A1033, making it ideal for research on steels and high-performance metallic materials.

Principle Overview

During heating and cooling of metallic materials, dimensional changes occur due to thermal expansion and phase transformations. The L78 RITA uses high-speed quenching dilatometry to measure sample length changes and converts them into strain data as a function of time and temperature.

By analyzing changes in the strain curves, the start and end of specific phase transformations can be accurately identified, including ferrite, pearlite, bainite, martensite, and austenitization processes.

Key Advantages of L78 RITA

Operation in vacuum, inert, oxidizing, and reducing atmospheres; temperature range from 150 °C to 1600 °C
Ultra-high heating and cooling rates up to 4000 °C/s using induction quenching design
Optional base configuration for analysis of non-metallic materials
Optimized for continuous or isothermal TTT, CCT, and CHT diagram generation
Fully automated software control of heating rate, atmosphere, and safety functions
Support for ASCII data export and graphical output for reporting and further analysis
High-speed data acquisition and dedicated gas quenching system ensure excellent repeatability

Phase Transformation Measurement Capability

Possible transformations during heating:

Ferrite, pearlite, bainite, martensite → austenitization

Possible transformations during cooling:

Austenite → ferrite, pearlite, bainite, martensite (or combinations)

Typical measurable diagrams and curves:

TTT Diagram: Time–Temperature–Transformation diagram for isothermal cooling analysis
CCT Diagram: Continuous Cooling Transformation diagram simulating real processing conditions
CHT Diagram: Continuous Heating Transformation diagram for steel heat treatment evaluation
Strain vs. Time/Temperature Curves: Identification of transformation start and finish points

Technical Specifications

Item	DIL L78 / RITA Quenching
Temperature range	-150 °C to 1600 °C
Sample type	Solid or hollow samples
Sample diameter	Ø 3 mm
Sample length	10 mm
Max. heating rate	≤ 4000 K/s
Max. cooling rate	≤ 4000 K/s
Length change range	± 2.5 mm / ± 5 mm

Typical Applications

Material types: Metals, steels, alloy materials
Industries: Automotive, aviation, aerospace, materials research, metallurgy
Key research topics:
- Austenitization behavior
- Isothermal and continuous cooling transformations
- Transformation rate and phase fraction analysis
- Strain vs. time/temperature curve development
- TTT / CCT / CHT diagram generation