AWS - CWI-Advanced Welding Metallurgy

Description

The CWI exam consists of three parts

Part A  Fundamentals

Part B  Practical

Part C  Code Book Applications

Part A is a closed-book exam that consists of 150 questions on the welding fundamentals, terms and definitions, welding processes, nondestructive examination, procedures, symbols, calculations, safety practices, and duties and responsibilities of a CWI

Part B is a practical hands-on test to find the ability to visually identify welding discontinuities and to determine the acceptance or rejection of a weld

Part C is an open book test of Code application to evaluate the applicant’s familiarity and ability with a selected code application

The pass marks for Part A  Part B and C is 72 percent

You can refer to the full details of AWS Certification and Qualification Standards in the following documents available at free of cost on the AWS website

QC1  2016  AMD1   Specification for AWS Certification of Welding Inspectors

B5.1  2013  AMD1   Specification for the Qualification of Welding Inspectors

Study the documents and be prepared well to answer any question from the document.

In this course, the candidate will learn the following  :

Preparation of reports

Complete knowledge and understanding of the following welding processes:

SAW  PAW  RW  SMAW  SW  FCAW  GTAW  OFW  ESW  GMAW

Thermal Spraying Soldering

Mechanical Cutting Thermal Cutting/Gouging

Brazing- Braze Welding

Welding Metallurgy

Part 1

Part 2

Part 3

Part 4

Structure of Metals, Formation of Crystalline Solids, BCC, FCC, HCP Structures, Disarray of Grain boundaries, Substitutional  and Interstitial solid solutions, Phase Transformation (critical points), Physical Structure of metals, Copper Silver phase Diagram, Welding the precipitation -hardening alloys, Dispersion Strengthening, Welding of Specific alloy Families, Aluminum alloys, Welding the heat treatable grades, Basic Metallurgy of steels, Chemical elements of Steels, Phase Transformation in Pure Iron,  and Steel, The Iron -Iron Carbon Equilibrium Diagram,  Heat Treatment of Steels, Effect of Cooling Rate on Transformation, Isothermal Transformation or TTT Diagram, Thermal characteristics of welds and Heat Affected Zone, Change of Temperature during welding, Factors influencing temperature changes in weld

Welding Metallurgy and Weldability of steel alloys 

Part 1

Part 2

Part 3

Part 4

Part 5 

Part 6

Part 7

Metallurgical Changes During Welding

Liquid Metal Solidification Modes

Centre line weld solidification cracks

Microstructure of the welded metal

Solidification of Weld Metal

Dendrite Growth, time, and Primary spacing

Gas-Metal Reactions during Welding

Welding of Ferrous Metals

Welding of Nonferrous Metals

Reactions of Liquid Metals

Hot Crack or Solidification Cracking

Reactions of Solid State

Delayed Cracking

Cold Cracking

Hydrogen Induced Cracking

Weld Strengthening Mechanism

Solidification of Grain Structure

Solid Solution Strengthening

Effect of temperature on Tensile strength

Precipitation Hardening

Heat affected Zone

Solid Solution Strengthened Alloys

Strain Hardened Base Metals

Re-crystallization of Cold Worked Grains in Heat-Affected Zone

Precipitation of Hardened Alloys

Transformation Of Hardening Alloys

The Base Metal weldability

Weldability of Commercial Alloys

Plain Carbon Steels- Low Alloy Steels

High Alloy Steels

Types of Stainless Steels

Other High Alloy Steels

Aluminum Alloys

Magnesium Alloys

Copper Alloys

Nickel Base Alloys

Cobalt Alloys

Refractory and Reactive Metals

Titanium Alloys

Zirconium

Hafnium

Tantalum

Columbium

Molybdenum

Tungsten Alloys

Beryllium -

The fundamental principles of the following ND Tests:

VT, MT, UT, PT, RT, LT

He will acquire knowledge of quality procedures and Quality audits/surveillance.

Knowledge and understanding of the fundamentals of welding metallurgy

Knowledge and understanding of all the welding symbols and engineering drawings.

Base material compliance

Filler metal compliance

Filler metal storage, handling

Inspection records compliance

Verification of proper documentation compliance

Base material and filler metal compatibility

Certification of documented results and compliance

Procedure qualification records compliance

Welding procedure compliance

NDE procedures compliance

Applicable safety requirements in the workplace as per the International Standards

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