Journal
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
Volume 45, Issue 12, Pages 3535-3545Publisher
WILEY
DOI: 10.1111/ffe.13828
Keywords
additive manufacturing; crack growth; small cracks; WAAM 18Ni 250 maraging steel; durability
Funding
- US Army International Technology Center, Indo-Pacific (ITCIPAC), Tokyo [FA520921P0164]
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This paper illustrates the durability analysis required to certify an additively manufactured part by using the examples of durability tests performed on two wire arc additively manufactured (WAAM) 18Ni 250 Maraging steel specimens.
MIL-STD 1530D requires that the certification of an aircraft part employ analytical tools that are capable of modeling crack growth. It is further stated that the durability and damage tolerance (DADT) analyses should be based on linear elastic fracture mechanics (LEFM) and follow a building block approach. This paper illustrates the durability analysis required to certify an additively manufactured part by using the examples of durability tests performed on two wire arc additively manufactured (WAAM) 18Ni 250 Maraging steel specimens.
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