High-throughput stochastic tensile performance of additively manufactured stainless steel
An adage within the Additive Manufacturing (AM) community is that “complexity is free”. Complicated geometric features that normally drive manufacturing cost and limit design options are not typically problematic in AM. While geometric complexity is usually viewed from the perspective of part design, this advantage of AM also opens up new options in rapid, efficient material property evaluation and qualification. In the current work, an array of 100 miniature tensile bars are produced and tested for a comparable cost and in comparable time to a few conventional tensile bars. With this technique, it is possible to evaluate the stochastic nature of mechanical behavior. The current study focuses on stochastic yield strength, ultimate strength, and ductility as measured by strain at failure (elongation). However, this method can be used to capture the statistical nature of many mechanical properties including the full stress-strain constitutive response, elastic modulus, work hardening, and fracture toughness. Moreover, the technique could extend to strain-rate and temperature dependent behavior. As a proof of concept, the technique is demonstrated on a precipitation hardened stainless steel alloy, commonly known as 17-4PH, produced by two commercial AM vendors using a laser powder bed fusion process, also commonly known as selective lasermore »
- Authors:
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[1];
[1];
[1];
[1];
[1];
[2];
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- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Univ. of New Mexico, Albuquerque, NM (United States)
- Publication Date:
- Report Number(s):
- SAND-2016-8156J
Journal ID: ISSN 0924-0136; 646806; TRN: US1700183
- Grant/Contract Number:
- AC04-94AL85000
- Type:
- Accepted Manuscript
- Journal Name:
- Journal of Materials Processing Technology
- Additional Journal Information:
- Journal Volume: 241; Journal Issue: C; Journal ID: ISSN 0924-0136
- Publisher:
- Elsevier
- Research Org:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Org:
- USDOE National Nuclear Security Administration (NNSA)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 42 ENGINEERING; 36 MATERIALS SCIENCE; additive manufacturing; rapid prototyping; 3D printing; deformation; tensile; statistics
- OSTI Identifier:
- 1333616
- Alternate Identifier(s):
- OSTI ID: 1410840