Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 728, Issue -, Pages 183-195Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2018.05.016
Keywords
Superalloy; Residual stress; Stress-oriented precipitation; Neutron diffraction; Mechanical property
Categories
Funding
- National Key Research and Development Program of China [2017YFB0702100]
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The following study presents a novel approach that utilizes residual stresses inside a component to produce stress-oriented precipitation and achieves texture strengthening during the ageing treatment. Refined investigations for the stress-oriented precipitation of gamma '' were achieved via transmission electron microscopes (TEM) and neutron diffraction (ND). The results showed that all three variants of gamma '' nucleated at short ageing times. The orienting effect of stress was appreciable only during the Ostwald ripening, due to the change of the gamma ''/gamma lattice mismatch. The effect that the stress-oriented precipitation had on the mechanical properties was evaluated and analyzed via tensile tests.
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