Correlation of hardening and microstructure of tantalum irradiated with heavy ions

Takeo Muroga; Kazufumi Yasunaga; Yutai Katoh; Hideo Watanabe; Naoaki Yoshida; Nobuaki Noda

doi:10.1520/stp12463s

Correlation of hardening and microstructure of tantalum irradiated with heavy ions

Takeo Muroga, Kazufumi Yasunaga, Yutai Katoh, Hideo Watanabe, Naoaki Yoshida, Nobuaki Noda

Research output: Contribution to journal › Conference article › peer-review

4 Scopus citations

Abstract

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.

Original language	English
Pages (from-to)	1186-1196
Number of pages	11
Journal	ASTM Special Technical Publication
Issue number	1366
DOIs	https://doi.org/10.1520/stp12463s
State	Published - 2000
Externally published	Yes
Event	19th International Symposium: Effects of Radiation on Materials - Seattle, WA, USA Duration: Jun 16 1998 → Jun 18 1998

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title = "Correlation of hardening and microstructure of tantalum irradiated with heavy ions",

abstract = "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.",

author = "Takeo Muroga and Kazufumi Yasunaga and Yutai Katoh and Hideo Watanabe and Naoaki Yoshida and Nobuaki Noda",

year = "2000",

doi = "10.1520/stp12463s",

language = "English",

pages = "1186--1196",

journal = "ASTM Special Technical Publication",

issn = "1040-3094",

number = "1366",

note = "19th International Symposium: Effects of Radiation on Materials ; Conference date: 16-06-1998 Through 18-06-1998",

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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.

UR - http://www.scopus.com/inward/record.url?scp=0034484380&partnerID=8YFLogxK

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 -

Correlation of hardening and microstructure of tantalum irradiated with heavy ions

Abstract

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