Mechanical Testing

The laboratory of the Mechanical Testing is equipped with cutting edge machines and measuring devices offering the capability of a wide spectrum mechanical tests under static and dynamic loading conditions and variable temperatures.

Characteristic examples of such testing techniques are the following:

  • Low and high temperature tensile testing
  • Low and high temperature three- and four-point bend testing
  • Static and Quasi-Static Compression testing
  • Sheet Formability testing
  • Fatigue testing
  • Impact testing
  • Creep testing
  • Universal hardness testing
  • CTOD Fracture Toughness testing

Formability testing equipment is available, including Erichsen doming and cup-drawing machines for the testing of anisotropic behaviour of rolled sheets.

The laboratory is also equipped with automated CNC machine tools not only for the preparation of test pieces but also for machinability studies of conventional and non conventional materials.

Its research activities also cover areas of failure analysis and root-cause investigation of materials and machine components.

 

Equipment

DESCRIPTION
CAPACITIES
APPLICATION
Electromechanical testing machine
Instron 5567.
Maximum load capacity up to 30 kN. Set of jaws 0-6.4mm & 6.4-12.7mm.Evaluation of mechanical properties of materials and components under various loading conditions: tensile and creep testing, 3p/4p-bending, peeling, etc.
Servohydraulic testing machine
Instron 8802.
Maximum load capacity up to 250 kN. Hydraulic grips (set of jaws: Flat 0-6.4mm & 6.4-12.7mm, Round 15-20mm). Equipped with two environmental chambers for controlled testing from -150oC to 600oC, and for gauge length localized heating up to 1400oC
(EN ISO 6892-1/2, ASTM E9, BS7448-1)
Evaluation of mechanical properties of materials and components under various loading conditions at ambient, cryogenic and elevated temperatures, as well as under variable strain-rate conditions: tensile testing, compression, 3p/4p-bending, fatigue testing, fracture toughness testing, creep. Hot ductility tests are also feasible for certain specification requirements.
Hardness tester
Instron Wolpert 971/750
Wide range of standard hardness testing of various scales:
Brinell (EN ISO 6506) – Maximum load up to 750 kg
Vickers (EN ISO 6507)
Rockwell/Superficial Rockwell (ASTM E18)
General applications, mainly covering a wide range of hardness testing of machine components and relatively large scale structural members.
Charpy impact testing machine
Instron Wolpert PW30
Maximum hammer energies: 300 J/150 J (covering mostly a wide class of steels of various tempers and light metals), according to ΕΝ ISO 148.01/ EN 10045 & ASTM E 23.Impact tests applied to V-notched specimens for fracture toughness determination of a wide range of applications.
Universal Automatic Sheet Testing Machine
Roell Amsler BUP 600
Maximum load up to 600kN. A broad set of various tooling accessories is available.Formability and sheet anisotropy testing: Cupping tests (Earing and Erichsen tests).
CNC turning machine
EMCO PC Turn 155
Max size of workpiece: Ø85x245mm.
Feed: 0 - 4 m/min.
Spindle speed: 150 - 4000 rpm.
Preparation of cylindrical standard tensile test specimens. Machinability tests (ISO 3685).
CNC milling machine
EMCO PC Mill 155
Max clamping surface: 520x180mm.
Feed: 0 - 4 m/min.
Spindle speed: 0 - 10000 rpm.
Preparation of thick (>3mm) flat tensile test specimens. Machinability tests.
Hydraulic blanking machineShearing of flat specimens of maximum thickness:
Steel: max 2 mm
Non Ferrous Metals : max 3 mm
Preparation of standard tensile test specimens from low-gauge sheets.

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