Ni_3Al(Zr)合金的高温环境脆性
ntal Embrittlement of Ni_3Al(Zr) Alloy at High Temperatures
查看参考文献17篇
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文摘
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Ni_3Al(Zr)合金在700～1 050°C之间存在低塑性区,无论在空气还是在真空中,都表现出脆性的沿晶断裂,塑性很低.在拉伸过程中形成的致密氧化铝薄膜能够有效地阻止氧向基体中扩散,减少环境脆性,提高合金的高温塑性.活性元素Zr能够与氧原子相互作用,减少裂纹沿晶界扩展,改善合金的高温塑性. |
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其他语种文摘
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The tensile ductility of the Ni_3Al(Zr) alloy is sensitive to temperature and exists low ductility from 700 to 1 050°C oth in air and 103 Pa vacuum.The fracture mode becomes intergrangular.The formation of oxide layer during tensile process at elevated temperature in air suppresses environmental embrittlement for the alloy.It is found that Al-rich oxide film is more effective in protecting the underlying alloy from oxygen penetration.Zr element presented in appropriate quantity can increase the ductility at intermediate temperature by their interaction with diffusing oxygen atoms. |
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来源
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南京航空航天大学学报
,2008,40(3):380-384 【核心库】
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关键词
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Ni_3Al(Zr)
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力学性能
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断裂
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环境脆性
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地址
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南京航空航天大学材料科学与技术学院, 江苏, 南京, 210016
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中国科学院金属研究所, 辽宁, 沈阳, 110016
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1005-2615 |
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学科
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金属学与金属工艺 |
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基金
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南京航空航天大学引进人才科研基金
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文献收藏号
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CSCD:3322381
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参考文献 共
17
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