TY - JOUR
T1 - Microstructure of creep-deformed V-4Cr-4Ti strengthened by precipitation and cold rolling
AU - Muroga, T.
AU - Nagasaka, T.
AU - Chen, J. M.
AU - Li, Y. F.
AU - Watanabe, H.
N1 - Funding Information:
This work was carried out based on NIFS Budget Code NIFS07UCFF003. This work was also supported by JSPS-CAS Core University Program.
PY - 2009/4/30
Y1 - 2009/4/30
N2 - The microstructural processes were investigated for V-4Cr-4Ti alloys strengthened by precipitation and cold rolling during thermal creep deformation and thermal aging in identical conditions at 1023 K. Cold rolling to precipitate-hardened V-4Cr-4Ti can suppress precipitate coarsening during the following high temperature aging. The dislocations observed were mixture of a〈1 0 0〉 and a/2〈1 1 1〉 types in the specimens with only thermal aging, and predominantly of a/2〈1 1 1〉 type in the specimens after the creep deformation. Coarsening of the precipitates was observed after the creep deformation. It seems to be essential to avoid the recovery of sessile a〈1 0 0〉 type dislocations induced by cold rolling for the purpose of maintaining the high temperature strength.
AB - The microstructural processes were investigated for V-4Cr-4Ti alloys strengthened by precipitation and cold rolling during thermal creep deformation and thermal aging in identical conditions at 1023 K. Cold rolling to precipitate-hardened V-4Cr-4Ti can suppress precipitate coarsening during the following high temperature aging. The dislocations observed were mixture of a〈1 0 0〉 and a/2〈1 1 1〉 types in the specimens with only thermal aging, and predominantly of a/2〈1 1 1〉 type in the specimens after the creep deformation. Coarsening of the precipitates was observed after the creep deformation. It seems to be essential to avoid the recovery of sessile a〈1 0 0〉 type dislocations induced by cold rolling for the purpose of maintaining the high temperature strength.
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U2 - 10.1016/j.jnucmat.2008.12.188
DO - 10.1016/j.jnucmat.2008.12.188
M3 - Article
AN - SCOPUS:64649103282
SN - 0022-3115
VL - 386-388
SP - 606
EP - 609
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
IS - C
ER -