杨彪,陈业新,李树龙.硼含量对有序态(Fe,Co)3V合金环境氢脆的影响[J].稀有金属材料与工程,2018,47(3):976~981.[Yang Biao,Chen Ye-xin,Li Shu-long.Effect of B content on environmental embrittlement of ordered (Fe,Co)3V alloys[J].Rare Metal Materials and Engineering,2018,47(3):976~981.]
硼含量对有序态(Fe,Co)3V合金环境氢脆的影响
投稿时间:2016-01-18  修订日期:2016-03-21
中文关键词:  有序态(Fe,Co)3V合金  硼含量  晶粒尺寸  环境氢脆
基金项目:国家自然科学基金资助(项目号51271102)
中文摘要:
      通过在真空和氢气环境下的拉伸实验,研究了硼含量对有序态(Fe,Co)3V合金力学性能和环境氢脆的影响。研究结果表明,当在有序态(Fe,Co)3V合金中添加0.02 wt.%B时,相对于无硼合金,合金的晶粒尺寸减小了27.5 %,合金在真空和氢气中的抗拉强度和延伸率均达到最大值;而当硼含量继续增加时,合金的晶粒尺寸、合金在真空和氢气中的力学性能均保持不变。无硼有序态(Fe,Co)3V合金在氢气中呈现严重的环境氢脆,当在合金中添加0.02 wt.%B后,合金氢脆因子降低了34.4 %,合金的断口形貌由完全沿晶断口转变为穿晶和沿晶的混合断口;当合金中的硼含量继续增加时,合金的氢脆因子不再降低,恒定在50 %左右,即硼原子只能部分抑制有序态(Fe,Co)3V合金在氢气中的环境氢脆。
Effect of B content on environmental embrittlement of ordered (Fe,Co)3V alloys
英文关键词:ordered (Fe,Co)3V  alloys, boron  content, grain  size, environmental  embrittlement
英文摘要:
      The mechanical properties and environmental embrittlement of ordered (Fe,Co)3V alloys doping with various boron content have been investigated when tensile tested in vacuum and 1 kPa H2. The results show that the grain size of the ordered (Fe,Co)3V alloy doped with 0.02 wt.%B decreased by 27.5 % compared with boron-free (Fe,Co)3V alloy, while the tensile strength and elongation reached the maximum. However, as the boron content in the ordered (Fe,Co)3V alloy exceeds 0.02 wt.%, the grain size and mechanical properties remain unchanged when tensile tested in vacuum and hydrogen gas. The ordered boron-free (Fe,Co)3V alloy exhibits severe brittleness in hydrogen gas. By adding 0.02 wt. %B the hydrogen embrittlement factor of the ordered (Fe,Co)3V alloy decrease by 34.4 % and the fracture mode changes from full intergranular to mixed fracture of intergranular and transgranular. But when boron content increases continuously in the ordered (Fe,Co)3V alloy, the hydrogen embrittlement factor keeps about 50 %, indicating boron cannot completely suppress the environmental embrittlement of the ordered (Fe,Co)3V alloy in hydrogen.
作者单位E-mail
杨彪 上海大学 材料研究所 yangbiaoalive@163.com 
陈业新 上海大学 材料研究所 yxchen@shu.edu.cn 
李树龙 上海大学 材料研究所  
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