Cyclic plasticity modeling and fatigue life assessment of the recasting material of a nickel-based superalloy induced by laser manufacturing

2021 ◽  
pp. 106154 ◽  
Author(s):  
Tinglian Zhang ◽  
Jingyu Sun ◽  
Huang Yuan
Keyword(s):  
Fatigue Life ◽  
Life Assessment ◽  
Cyclic Plasticity ◽  
Nickel Based Superalloy ◽  
Fatigue Life Assessment ◽  
Laser Manufacturing

Fatigue-Life Assessment

2021 ◽  
pp. 98-133
Author(s):  
Phillip E. Prueter
Keyword(s):  
Fatigue Life ◽  
Damage Tolerance ◽  
Pressure Vessels ◽  
Life Assessment ◽  
Cyclic Plasticity ◽  
Fatigue Assessment ◽  
Fatigue Life Assessment ◽  
Component Design ◽  
Engineering Mechanics ◽  
Growth Approach

Abstract This article offers an overview of fatigue fundamentals, common fatigue terminology, and examples of damage morphology. It presents a summary of relevant engineering mechanics, cyclic plasticity principles, and perspective on the modern design by analysis (DBA) techniques. The article reviews fatigue assessment methods incorporated in international design and post construction codes and standards, with special emphasis on evaluating welds. Specifically, the stress-life approach, the strain-life approach, and the fracture mechanics (crack growth) approach are described. An overview of high-cycle welded fatigue methods, cycle-counting techniques, and a discussion on ratcheting are also offered. A historical synopsis of fatigue technology advancements and commentary on component design and fabrication strategies to mitigate fatigue damage and improve damage tolerance are provided. Finally, the article presents practical fatigue assessment case studies of in-service equipment (pressure vessels) that employ DBA methods.

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