Application

This unit of competency defines the skills and knowledge required to apply basic metallurgical principles to the selection of appropriate non-destructive testing (NDT) techniques and interpretation of the results of NDT tests for metallurgical processes.

It applies to knowledge of metallurgical principles, and the relationship between the various non-destructive testing methods and their capabilities and limitations when applied to the detection of specific discontinuities in metals and alloys.

The unit applies to employees who select and order NDT tests and who interpret results provided by tests for metal manufacturing, casting, shaping, and joining processes. It does not involve conduct of NDT tests.

Where materials and chemicals which are subject to codes and regulations are stored and used - for example, chemicals, explosives, solvents, dangerous materials, acids, or noxious waste products - safe work habits must be considered.

No licensing, legislative or certification requirements apply to this unit at the time of publication.

What You'll Learn

Assessment Requirements

Performance Evidence

Evidence required to demonstrate competence in this unit must be relevant to and satisfy the requirements of the elements and performance criteria and include:

following work instructions, standard operating procedures (SOPs) and safe work practices

researching and applying metallurgical principles associated with selecting non-destructive testing (NDT) appropriate to metal or alloy and manufacturing process

interpreting and applying principles and methods for fusion welding of metals and alloys in weldments on at least two occasions

identifying defects in weldments

identifying defects in metal and alloy castings

interpreting and applying principles and methods used to produce steel forging on at least two occasions

interpreting and applying principles of mechanical testing on at least two occasions

identifying and classifying all defects from NDT test results on at least two occasions.

Note: Where a volume and/or frequency is not specified, demonstration must be provided at least once.

Knowledge Evidence

Evidence required to demonstrate the required knowledge for this unit must be relevant to and satisfy the requirements of the elements and performance criteria and include knowledge of:

safe work practices and procedures

principles of solidification and crystal structures in metal including:

classification of materials

structure of atoms

process of solidification and defects formed during solidification

crystal structures and modification of crystal structure

heat treatment processes and defects formed during heat treatment

meaning of equilibrium diagrams representative of metals including aluminium, iron, steel and common nonferrous alloys including:

alloy systems

solid and liquid solubility

basic equilibrium diagrams for common alloys

principles of fusion welding in relation to NDT testing

defects in fusion welding including:

processing and service defects

grinding

pickling

heat treatment

fatigue

corrosion and stress corrosion cracks

principles of the formation of castings

defects in castings

principles of steel forging

defects in steel forging

principles and methods for fusion welding of metals and alloys including:

manual metal arc welding (MMAW)

submerged arc welding (SAW)

gas metal arc welding (GMAW)

gas tungsten arc welding (GTAW)

flux core arc welding (FCAW)

defects in weldments including:

cracks

lack of fusion

cavities

imperfect shape

solid inclusions

defects in metal and alloy casting including:

shrinkage cavities

hot tears

cold cracks

gas holes

principles and methods used to produce steel forgings including:

deformations

strengthening mechanisms

annealing

principles of mechanical testing including:

impact

tensile

hardness testing.

Assessment Conditions

Assessors must:

have vocational competency in applying metallurgical principles at least to the level being assessed with relevant industry knowledge and experience

satisfy the assessor requirements in the Standards for Registered Training Organisations 2015 or its replacement and comply with the National Vocational Education and Training Regulator Act 2011, its replacement or equivalent legislation covering VET regulation in a non-referring state/territory as the case requires.

Where possible, assessment must occur in operational workplace situations. Where this is not possible or where personal safety or environmental damage are limiting factors, assessment must occur in a sufficiently rigorous simulated environment that reflects realistic operational workplace conditions that cover all aspects of workplace performance, including environment, task skills, task management skills, contingency management skills and job role environment skills.

Conditions for assessment must include access to all tools, equipment, materials and documentation required including relevant workplace procedures, product and manufacturing specifications.

Assessment processes and techniques must be appropriate to the language, literacy and numeracy requirements of the work being performed and the needs of the candidate.

Foundation Skills

• text: This section describes those language, literacy, numeracy and employment skills that are essential to performance. Foundation skills essential to performance are explicit in the performance criteria of this unit of competency.

Prerequisite Units

• {'code': 'MEM13015', 'title': 'Work safely and effectively in manufacturing and engineering'}
• {'code': 'MEM16006', 'title': 'Organise and communicate information'}

Parent Qualifications

• MEM40119 — Certificate IV in Engineering
  MEM

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