Precipitation during Quenching in 2A97 Aluminum Alloy and the Influences from Grain Structure.

ABSTRACT: The quench-induced precipitation and subsequent aging response in 2A97 aluminum alloy was investigated based on the systematic microstructure characterization. Specifically, the influence on precipitation from grain structure was examined. The results indicated the evident influence from the cooling rate of the quenching process. Precipitation of T1 and δ' phase can hardly occur in the specimen exposed to water quenching while become noticeable in the case of air cooling. The yield strength of 2A97-T6 alloy de-graded by 234 MPa along with a comparable elongation when water quenching was replaced by air cooling. Sub-grains exhibited a much higher sensitivity to the precipitation during quenching. The presence of dislocations in sub-grains promoted the quench-induced precipitation by acting

SUBMITTER: Wang X 

PROVIDER: S-EPMC8197508 | biostudies-literature | 2021 May

REPOSITORIES: biostudies-literature