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硼含量(0.01～0.06wt.%B)对有序态Ni-24at.%Fe合金在真空和氢气环境中的力学性能有较大的影响,对有序态Ni3Fe合金在氢气环境中的氢脆敏感性也有较大的作用.研究结果表明,加硼后有序Ni3Fe合金的晶粒尺寸得到细化,材料的强韧性提高;硼有效抑制了有序态Ni-24at.%Fe合金在氢气环境中的氢脆.当合金中硼含量为0.06wt.%时,有序态Ni3Fe合金在氢气环境中的氢脆因子(IH2)为1%,与无硼Ni3Fe合金相比,合金氢脆因子的下降幅度达到98.7%.在氢气环境中拉伸时,无硼有序态Ni3Fe合金的断口形貌为完全的沿晶断口;随着Ni3Fe合金中硼含量的增加,合金断口形貌中的沿晶断口所占比例逐渐减少;当合金中的硼含量大于0.03wt.%后,断口形貌变为全部塑性的韧窝状断口.合金的断口形貌变化表明,有序态Ni3Fe合金中的硼提高了合金的晶界强度.硼对有序态Ni3Fe合金在氢气环境中力学性能和氢脆因子的作用变化表明,硼对有序态Ni3Fe合金中由氢气诱发的环境氢脆有较强的抑制作用.
The boron content (0.01 ~ 0.06wt.% B) has a great influence on the mechanical properties of Ni-24at.% Fe alloy in vacuum and hydrogen atmosphere. The hydrogen embrittlement of Ni3Fe alloy in the hydrogen environment The results show that the grain size of the ordered Ni3Fe alloy after boron addition is refined and the toughness of the material is enhanced. Boron effectively inhibits the growth of Ni-24at.% Fe alloy in the hydrogen environment Hydrogen embrittlement in the alloy when the boron content of 0.06wt.%, Ordered Ni3Fe hydrogen embrittlement factor (IH2) in a hydrogen atmosphere was 1%, compared with the boron-free Ni3Fe alloy hydrogen embrittlement factor With a decrease of 98.7% .When hydrogen is stretched in the hydrogen environment, the fracture morphology of the boron-free ordered Ni3Fe alloy is a complete intergranular fracture. Along with the increase of boron content in the Ni3Fe alloy, When the content of boron in the alloy is more than 0.03wt.%, The fracture morphology becomes all-plastic dimple fracture.The fracture morphology of the alloy shows that the boron in the ordered Ni3Fe alloy increases The effect of boron on the mechanical properties and hydrogen embrittlement factor of ordered Ni3Fe alloy in hydrogen atmosphere Of it showed strong inhibition of boron ordered state Ni3Fe alloy of hydrogen-induced environmental embrittlement.