ON THE FRACTURE OF COLD-WORKED ZR-2.5NB PRESSURE TUBES FABRICATED FROM 100-PERCENT RECYCLED MATERIAL

被引:0
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作者
DAVIES, PH [1 ]
AITCHISON, I [1 ]
HIMBEAULT, DD [1 ]
JARVINE, AK [1 ]
WATTERS, JF [1 ]
机构
[1] ATOM ENERGY CANADA LTD,WHITESHELL LABS,PINAWA,MB R0E 1L0,CANADA
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中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
A study was completed on irradiated and unirradiated (offcut) material from Pickering Nuclear Generating Station (NGS) A Unit 3 pressure tubes which were fabricated from ingots of 100% recycled material (quadruple-vacuum-arc-melted). The toughness of the material is shown to be generally higher than that of previous material fabricated from <100% recycled material (double-vacuum-arc-melted). Fractographic and microstructural studies demonstrate that variations in toughness of the low chlorine (<1 ppm) material are predominantly due to preferential void nucleation at particles, in particular aligned zirconium phosphides. In the absence of such particles, very high toughness levels can be maintained after irradiation.
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页码:789 / 800
页数:12
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