Welding involves various metallurgical phenomena, including melting, freezing, diffusion, precipitation, thermal strains, and shrinkage. If disregarded or misunderstood, these effects can lead to cracking, porosity, or welds with poor properties. This course is designed to build on the fundamental principles described in Metallurgy I to provide a basic understanding of the nature of metals, the metallurgical phenomena involved in welding, and the effects of these phenomena on the properties of welded materials.
At a Glance
Access to Course Materials
Course – 30 days
Exam – 10 more days
Course Length & Earnings
Approximately 6 hours
6 PDHs / 0.6 CEUs
Who Should Take This Course
Student Learning Outcomes
- Anyone involved in the design, fabrication, or inspection of welded, brazed, or soldered joints
- Anyone wishing to learn about, and how to manipulate, the crystal structure of metals
- Anyone seeking to prepare for the AWS Certified Welding Inspector exam
- This student body may encompass many positions, including:
- Welding engineers
- Welding inspectors
- Welding supervisors
- Shop owners
- This student body may encompass many positions, including:
Prior to taking this course, students should be familiar with basic welding processes and welding terminology. This prerequisite knowledge can be obtained by:
- Taking the AWS Welding Fundamentals I online course
- Obtaining and reading a copy of AWS A3.0 Standard Terms and Definitions
- Successfully completing the Metallurgy I course
This course teaches students how to:
- Explain crystal structures and grain growth
- Describe how metals interact through solubility and diffusion
- Extract information from phase, TTT, and CCT diagrams
- Explain the need for heat treatments and stress relief
- Differentiate between plastic and elastic deformation
- Explain how a material’s thermal characteristics affects is weldability
Upon completion of Metallurgy II, students will be able to:
- Identify and describe the common crystal structures of metal
- Explain metal solidification and grain growth
- Differentiate between solid solubility and diffusion
- Describe substitutional and interstitial alloying
- Explain the diffusion process
- Describe microstructure, phases, and phase transformation
- Cite basic information about a given material utilizing a phase diagram
- Identify the components of an iron-carbon phase diagram
- Describe the process of phase transformations as an iron-carbon alloy is heated and cooled
- Cite the difference between TTT and CCT diagrams
- Define force, stress, strain, deformation, and failure
- Identify and describe the five basic kinds of stress
- Differentiate between plastic and elastic deformations
- Calculate stress and strain and Young’s modulus
- Identify the physical properties of a metal that impact heat flow
- Differentiate metals with high and low thermal conductivity
- Explain the relationship between heat and density
- Discuss how atomic mass influences a material’s specific heat capacity
- Discuss the factors that influence thermal diffusivity
- Describe the heat affected zone and explain how it correlates with the iron-carbon phase diagram
- Explain how heat input, preheat, carbon equivalent, base metal thickness, and cooling rate affect the heat affected zone
- Describe the various heat treatments used in welding
- Compare the efficacy of different quenching mediums
- Define thermal expansion and residual stress
- Describe the main types of welding distortion
- Cite techniques to reduce distortion and residual stress
- Identify the principal elements of stainless steel and their roles
- Identify and describe the five types of stainless steel
- Describe how to prevent sensitization and hot short cracking in austenitic stainless steel
- Explain metallurgical concerns that should be considered when welding stainless steel, aluminum, and copper
- Module 1 – The Structure of Metals and How It Forms
- Module 2 – Alloying, Diffusion, and Solid Solubility
- Module 3 – Phase Diagrams I: Introduction to Phases and Phase Diagrams
- Module 4 – Phase Diagrams II: Iron-Carbon Phase Diagram
- Module 5 – Mechanical Properties of Metal
- Module 6 – Thermal Characteristics I: Thermal Conductivity and Density
- Module 7 – Thermal Characteristics II: Specific Heat and Thermal Diffusivity
- Module 8 – Metallurgical Considerations for Welding and Heat Treatments
- Module 9 – Heat Treatments
- Module 10 – Residual Stress, Distortion, and Stress Relief
- Module 11 – Stainless Steel, Aluminum, and Copper
Frequently Asked Questions
How much do I need to know before taking this course?
To get the most out of this course, it is helpful to understand the basic principles that underlie the broad field of metallurgy. These include the characteristics of atoms, the periodic table, chemical bonding, chemical reactivity, the atomic structure of materials, and the properties of metals. These topics are covered in the AWS online course, Metallurgy I.
Who should take this course?
This course is ideal for both students and professional who want to learn or reacquaint themselves with the nature of metals, the metallurgical phenomena involved in welding, and the effects of these phenomena on the properties of welded materials.
How long do I have to complete this course?
Participants have access to the course content 24 hours a day for a period of 30 days from the date of registration. After this 30-day period, participants will have an additional 10 days to pass the completion exam. The exam can be activated before the end of the 30-day period if the participant has completed all the modules.
Does this course include a completion exam?
Yes. Upon completion of the final course module, participants are prompted to take an exam designed to evaluate their comprehension of the subject matter. The completion exam consists of 50 multiple-choice questions and must be completed within a 90 minute period. Participants who do not attain the 75% passing score may attempt to retake the exam a second time. Participants who attain a score of 75% or more on the completion exam earn an AWS Certificate of Completion and 6 Professional Development Hours (PDHs). The AWS Certificate of Completion can be downloaded and printed directly from the webpage.
Do I need to purchase any other materials?
No. All the materials and resources necessary to complete the course objectives are included.
Do I receive Professional Development Hours (PDHs) for completing this course?
Yes. Participants that receive a score of 75% or above on the Completion Exam will receive an AWS Certificate of Completion and 6 Professional Development Hours (PDHs).
Can I use these Professional Development Hours (PDHs) for recertification?
Yes. Professional Development Hours (PDHs) earned through AWS online courses can be applied towards recertification provided the PDH’s are earned during the certification period.
Do I receive Continuing Education Units (CEUs) for completing this course?
Can I use these Continuing Education Units (CEUs) for recertification?
Will this course help prepare me for the Certified Welding Inspector Exam?
Yes. The Certified Welding Inspector Fundamentals Exam (Part A) contains questions concerning the topics covered in this seminar. This course is designed to help prepare participants for this section of the exam.
What platforms and devices can I use to view AWS Learning online courses?
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