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5. 晶粒取向对双晶模型氢扩散的影响

晶粒取向对双晶模型氢扩散的影响

来源 :中国科技论文 | 被引量 : 0次 | 上传用户：liuhaiyi123

【摘 要】

：

奥氏体不锈钢长期服役于氢环境会产生氢脆,引起结构安全隐患;氢的扩散与材料晶界倾角和晶粒取向密切相关,尤其是氢扩散和晶粒取向之间的关系还未被很好地解释.针对上述问题,提出利用ABAQUS软件建立有限元模型,将奥氏体不锈钢各向异性行为和氢扩散进行耦合,以考虑晶粒取向对双晶模型氢扩散的影响,并研究3种不同晶粒取向组成的双晶模型.结果表明:晶界附近区域的应力集中由晶粒取向不同导致;应力对氢扩散有促进作用;晶粒取向与晶粒尺寸大小无关.

【作 者】

：

闫涛 杨富强 张文娟 张越 

【机 构】

：

西安科技大学机械工程学院,西安710054;西安科技大学理学院,西安 710054

【出 处】

：

中国科技论文

【发表日期】

：

2021年12期

【关键词】

：

氢扩散 晶粒取向 双晶模型 ABAQUS软件 

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奥氏体不锈钢长期服役于氢环境会产生氢脆,引起结构安全隐患;氢的扩散与材料晶界倾角和晶粒取向密切相关,尤其是氢扩散和晶粒取向之间的关系还未被很好地解释.针对上述问题,提出利用ABAQUS软件建立有限元模型,将奥氏体不锈钢各向异性行为和氢扩散进行耦合,以考虑晶粒取向对双晶模型氢扩散的影响,并研究3种不同晶粒取向组成的双晶模型.结果表明:晶界附近区域的应力集中由晶粒取向不同导致;应力对氢扩散有促进作用;晶粒取向与晶粒尺寸大小无关.

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