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Pulsed electric current joining of oxide-dispersion-strengthened austenitic steels

Journal Article · · Journal of Materials Science
 [1];  [1];  [1];  [1];  [2];  [3];  [1]
  1. Univ. of Nebraska, Lincoln, NE (United States)
  2. Texas A & M Univ., College Station, TX (United States)
  3. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

The solid-state joining of oxide-dispersion-strengthened (ODS) austenitic steels was achieved using a pulsed electric current joining (PECJ) process. Microstructures of the austenitic grain structures and oxide dispersions in the joint areas were characterized using electron microscopy. Negligible grain growth was observed in austenitic grain structures, while slight coarsening of oxide dispersions occurred at a short holding time. The mechanisms of the PECJ process may involve three steps that occur simultaneously, including the sintering of mechanical alloying powders in the bonding layer, formation of oxide dispersions, and bonding of the mechanical alloying powders with the base alloy. The high hardness and irradiation resistance of ODS alloys were retained in the joint areas. This research revealed the fundamental mechanisms during the PECJ process, which is beneficial for its potential applications during the advanced manufacturing of ODS alloys.

Research Organization:
Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE National Nuclear Security Administration (NNSA); National Science Foundation (NSF); USNRC
Grant/Contract Number:
NA0003525
OSTI ID:
1820429
Report Number(s):
SAND--2021-11031J; 699173
Journal Information:
Journal of Materials Science, Journal Name: Journal of Materials Science Vol. 56; ISSN 0022-2461
Publisher:
SpringerCopyright Statement
Country of Publication:
United States
Language:
English

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