DIL 805L Quenching Dilatometers

The DIL805 Series from TA Instruments has four models - DIL 805L and DIL 805A are quenching dilatometers, DIL 805A/D is a quenching dilatometer with the ability to deform the specimen by compression, and DIL 805A/D/T can also stretch it in tension mode.

All four instruments are totally automated, self-contained units used to measure dimensional changes under challenging conditions of controlled cooling and heating.

In the quenching mode the sample, hollow or solid, is inductively heated to a temperature plateau and is then cooled at a user-defined (exponential or linear) cooling rate. The phase transformation occurring in the nonstop cooling process or in the isothermal dwell, with or without compression/tensile stress, is specified by the measured change in length.

A range of isothermal or cooling curves signifies an isothermal time-temperature-transformation (TTT) diagram or a continuous-cooling-transformation (CCT) diagram respectively. The DIL 805A specifies the benchmark for establishing these dimensional changes and phase transitions. Functioning from -160 °C up to 1500 °C (in two diverse furnace configurations) with heating rates of up to 4000 °C/s and cooling rates of 2500 °C/s, can closely mimic the material response for any heat treatment process or production.

The DIL 805A/D, on top of the quenching mode, is well-known for its capability to deform the specimen with controlled deformation rates of 0.01 to 200 mm/s. Used to improve steel processes like hot or cold rolling, the DIL 805A/D allows to develop time-temperature-transformation diagrams after deformation (DTTT) and is also used to test creep and relaxation processes.

The DIL 805A/D/T additionally extends the capabilities to alternate tensile and compressive loading to emulate mill processing. Furthermore, tensile loading to fracture lends extra information about material’s final performance and allows creation of true-stress vs true-strain or stress/strain cycling plots.

Specifications

DIL 805L DIL 805A DIL 805A/D DIL 805A/D/T
Temperature Range
(sample dependent)
-150 °C to 1300 °C
50 °C to 1500 °C
-150 °C to 1300 °C
50 °C to 1500 °C
50 °C to 1500 °C 50 °C to 1500 °C
Heating principle inductive inductive inductive inductive
Sample material Electrically conductive hollow or solid body Electrically conductive hollow or solid body Electrically conductive solid body Electrically conductive solid body
Sample Geometry OD 4 mm
Length 10 mm
OD 4 mm
Length 10 mm
OD 5 mm
Length 10 mm
OD 5 mm
Length 10 mm
Length Resolution 50 nm 50 nm 50 nm 50 nm
Temperature Resolution 0.05 °C 0.05 °C 0.05 °C 0.05 °C
Atmosphere inert gas, vacuum, air inert gas, vacuum, air inert gas, vacuum, air inert gas, vacuum, air
Heating rate
Cooling rate
2000 °C/sec
2500 °C/sec
4000 °C/s
2500 °C/sec
100 °C/s
100 °C/sec
100 °C/s
100 °C/sec
Deformation force up to 20.0 kN up to 8.0 kN
Deformation rate 0.01 – 200 mm/s 0.01 – 20 mm/s
Strain rate φ 0.001 – 20.0 s-1 0.001 – 20.0 s-1
True strain φ 0.05 – 1.2 0.05 – 1.2
Minimum Gage Length 3 mm 3 mm
Number of deformation steps any number any number
Pause between deformation steps 60 msec 60 msec

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