Mechanical Testing Techniques

Wednesday 5th February 2020
Holiday Inn, Coventry, M6 J2, CV2 2HP


Are you a manager or technician responsible for the testing of metals or metal components?
Are you interested in improving your knowledge of testing and test results interpretation?
Are you are a designer, specifier or work in a sales or purchasing environment?
This is the course for you!

Learning Objectives:

  • Understand the meaning of terms such as strength, ductility, hardness and toughness
  • Appreciate why compromise between high values of strength and toughness is necessary
  • Understand the metal structure differences between continuous and discontinuous yielding
  • Be familiar with parameters such as yield strength, proof stress, UTS,ductility measures and engineering stress-strain.
  • Distinguish between ductile, brittle and intergranular failures
  • Gain an insight into creep, fatigue and fracture mechanics

Register:
Special offer of £220.00 (plus VAT) per person - usual price £299

To register, please email:
Rachel.Jordan@zwickroell.com

For the full agenda, please see below

Agenda

Section 1: Introduction

Section 2: Tensile Tests

  • Tensile tests: parameters, sample preparation and types
  • Gripping methods: screw, wedge, hydraulic and pneumatic
  • Contact and non-contact extensometry
  • Continuous and discontinuous yielding; influence of metal structure
  • Further test parameters: engineering and true stress-strain, work hardening index

Section 3: Ductile, brittle and intergranular failure

  • Deformation of ductile metals
  • Brittle (or cleavage) fracture
  • Ductile-brittle transition
  • Crack propagation and crack arresting mechanisms
  • Intergranular fracture

Section 4: Hardness Tests

  • Hardness principles: Brinell, Vickers, Rockwell; indenters and test conditions
  • Relationship between hardness and grain size: Hall-Petch equation
  • Micro-hardness tests: Vickers and Knoop
  • Nano-indentation
  • Hardness conversion

Section 5: Pendulum impact tests

  • Toughness: a definition
  • Charpy and Izod test procedures
  • Sample types: full and sub-sized samples
  • Test results: ductile-brittle transition temperature
  • Role of microstructure
  • Charpy vs Izod

Section 6: Fatigue and creep testing

  • Fatigue in metals
  • Fatigue testing: axial loading and rotating bend test machines
  • Fatigue testing: stress-life (S-N), strain-life (ε-N) and fatigue crack growth rate (da / dN - ΔK) approaches
  • Stages of creep
  • Creep mechanisms: dislocation climb, Nabarro-Herring and Coble creep
  • Creep and stress rupture testing

Section 7: Fracture mechanics

  • Linear-elastic fracture theories
  • Fracture toughness tests: methods and sample types
  • Factors affecting toughness
  • Realm of application for different fracture mechanics theories; LEFM, EPFM etc.
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