Effect of radial hydrides on fracture behavior of Zr-2.5Nb pressure tube material

被引：1
|
作者：
Bind, A. K. [1 ,2 ]
Avinash, G. [3 ]
Sunil, Saurav [1 ]
Sharma, R. K. [4 ]
Singh, R. N. [1 ,2 ]
机构：
[1] Bhabha Atom Res Ctr, Mech Met Div, Mumbai 400085, India
[2] Homi Bhabha Natl Inst, Mumbai 400094, India
[3] Indira Gandhi Ctr Atom Res, Mat Dev & Technol Div, Kalpakkam 603102, India
[4] Nucl Power Corp India Ltd, Mumbai 400094, India
来源：
JOURNAL OF NUCLEAR MATERIALS | 2024年 / 588卷
关键词：
Zr-2.5Nb alloy; Radial hydride; Fracture toughness; S curve; HYDROGEN CONTENT; ZIRCONIUM HYDRIDE; CRACK INITIATION; TOUGHNESS; TEMPERATURE; EMBRITTLEMENT; STRENGTH; STRESS; ALLOYS; MICROSTRUCTURE;
D O I：
10.1016/j.jnucmat.2023.154800
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The fracture behavior of Zr-2.5Nb pressure tube (PT) material containing radial hydrides with hydrogen concentrations between 30 and 300wppm was evaluated between 25 and 300 degrees C covering lower-shelf, transition and upper-shelf temperatures. The fracture toughness vs. temperature curves showed S curve behavior. In the lowershelf region, specimens failed in a brittle manner with unstable crack growth, whereas in the upper-shelf region, specimens showed ductile fracture with stable crack growth. The S curve shifted to higher temperatures with hydrogen concentration, with saturation of lower-shelf, transition and upper-shelf temperatures between 100 and 300wppm. The fracture behavior was rationalized in terms of the strength of the Zr-2.5Nb PT material, hydrogen terminal solid solubility during dissolution, stress in the hydride during hydride dissolution, the hydride continuity coefficient and the strength of the embedded hydrides.
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页数：9
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