TY - JOUR
T1 - Correlation of hardening and microstructure of tantalum irradiated with heavy ions
AU - Muroga, Takeo
AU - Yasunaga, Kazufumi
AU - Katoh, Yutai
AU - Watanabe, Hideo
AU - Yoshida, Naoaki
AU - Noda, Nobuaki
PY - 2000
Y1 - 2000
N2 - The microhardness change of tantalum irradiated with heavy ions has been evaluated using a micro-indentation technique. The increase in hardness by irradiation was significant below approximately 900 K and negligible above approximately 1100 K. The hardness decreased steeply with temperature at approximately 1000 K. Correlation of the results with microstructure data showed that the strength of voids and line dislocations as barriers against deformation should be very weak relative to that of loops and TEM-invisible defects. The temperature and fluence dependence of the hardening by TEM-invisible defects, derived by the correlation, implied an accumulation process of cascade vacancy clusters during irradiation.
AB - The microhardness change of tantalum irradiated with heavy ions has been evaluated using a micro-indentation technique. The increase in hardness by irradiation was significant below approximately 900 K and negligible above approximately 1100 K. The hardness decreased steeply with temperature at approximately 1000 K. Correlation of the results with microstructure data showed that the strength of voids and line dislocations as barriers against deformation should be very weak relative to that of loops and TEM-invisible defects. The temperature and fluence dependence of the hardening by TEM-invisible defects, derived by the correlation, implied an accumulation process of cascade vacancy clusters during irradiation.
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U2 - 10.1520/stp12463s
DO - 10.1520/stp12463s
M3 - Conference article
AN - SCOPUS:0034484380
SN - 1040-3094
SP - 1186
EP - 1196
JO - ASTM Special Technical Publication
JF - ASTM Special Technical Publication
IS - 1366
T2 - 19th International Symposium: Effects of Radiation on Materials
Y2 - 16 June 1998 through 18 June 1998
ER -