3D In-situ Stop Action Study of Recrystallization in Additively Manufactured 316L Stainless Steel: Reconstruction Optimization and Observations

Conference · Sat Jan 01 04:00:00 EST 2022

DOI:https://doi.org/10.1088/1757-899X/1249/1/012054· OSTI ID:1960020

Liu, He; Zhang, Yueheng; Wilkin, Mathew; Park, Jun-Sang; Kenesei, Peter; Rollett, Anthony D.; Suter, Robert

A volume of an additively manufactured 316L stainless steel sample has been tracked during its recrystallization using near-and far-field High Energy Diffraction Microscopy (HEDM) and absorption tomography at Advanced Photon Source beamline 1-ID. A nearfield compatible in situ furnace allows monitoring of Bragg diffraction signals as they evolve out of a weak and diffuse background while the sample temperature is approximate to 1250 degrees C. The sample is rapidly cooled to room temperature after observation of significant signal evolution and ti similar to 0.035 mm(3) is mapped by the near-field method. Four cycles of heat treatment follow the structure from a state of small, isolated grains through impingement of domains to near completion of recyrstallization. Here, the experiment and reconstructions are described, and recrystallized fractions, twin domains, and distributions of grain boundary types are discussed.

• Research Organization: Argonne National Laboratory (ANL)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science - Office of Basic Energy Sciences
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 1960020
• Country of Publication: United States
• Language: English