In situ x-ray diffraction of an arc weld showing the phase transformations of Ti and Fe as a function of position in the weld performed at a synchrotron

Journal Article · Sat Dec 31 04:00:00 EST 1994 · Advances in X-Ray Analysis

DOI:https://doi.org/10.1007/978-1-4615-2528-8_58· OSTI ID:272838

Wong, J; Elmer, J W; Waide, P A ^[1]

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1. Lawrence Livermore National Lab., CA (United States); and others

The synchrotron x-ray source provides a unique opportunity to observe {open_quotes}in-situ{close_quotes} processes. The formation of the {open_quotes}short-lived{close_quotes} intermediate species, Ta{sub 2}C, during the combustion synthesis of TaC, has been observed and reported by monitoring the Bragg diffraction peaks of the reactants and products. Similarly, the synthesis of the ferroelectric material, BaTiO{sub 3}, and subsequent phase transformation from cubic to tetragonal have also been investigated. These experiments would not have been possible without the high incident x-ray flux available at a synchrotron source. The physical and mechanical properties of a weld join are highly independent upon the thermal history of the weld. Factors such as grain size, which increases with annealing, influence the tensile strength of the weld. This work presents the results of an investigation of the phase changes in two materials, titanium and stainless steel, which occur during the welding process. 4 refs., 3 figs.

• Sponsoring Organization: USDOE
• OSTI ID: 272838
• Journal Information: Advances in X-Ray Analysis, Journal Name: Advances in X-Ray Analysis Vol. 37; ISSN AXRAAA; ISSN 0376-0308
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
66 PHYSICS
PHASE TRANSFORMATIONS
STAINLESS STEELS
SYNCHROTRON RADIATION SOURCES
TITANIUM
WELDED JOINTS
X-RAY DIFFRACTION