水素度对多晶铁在三轴张力下强度和损伤的作用

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Updated: Feb 28, 2026

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Published on: January 28, 2020

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Yi Liao¹, Runting Chen¹, Wanghui Li²

¹School of Mechanical Engineering, Southwest Petroleum University, Chengdu 610500, China.

Materials (Basel, Switzerland)

|February 27, 2026

概括

铁 (Fe-H) 系统中的通过阻碍低度的位移来阻碍空气增长. 温度显著影响机械强度和结构障碍在较高度.

科学领域:

材料科学材料科学材料科学
计算材料科学科学计算材料科学
固体力学固体力学是什么

背景情况:

了解铁 (Fe-H) 系统的机械行为对于材料工程至关重要.
在暴露在环境中的材料中,脆性是一个重大问题.
预测材料故障需要详细了解压力下的空洞演变.

研究的目的:

为了研究在三轴拉伸负荷下Fe-H系统的机械反应.
分析度和温度对应力状态和空洞演变的影响.
阐明气和温度对材料稳定性的结合作用.

主要方法:

用分子动力学模拟来建模Fe-H系统.
应用了三轴拉伸负荷条件来模拟机械应力.
进行了度和温度的系统变化.

主要成果:

低度 (≤1%) 阻碍脱位运动,通过纠和循环形成减缓空隙生长.
空气体积的演变遵循一个三阶段的模式:缓慢的增长,快速的增长,以及凝结后减缓的增长.
空隙表面积的变化是由于崩/凝结和膨胀之间的平衡造成的.
集群周围的空隙形成对结构稳定性产生了重大影响.
在高温下,温度主导强度;低效应是可以忽略不计的.
在高温下,度增加会加剧结构障碍.

结论:

对空隙生长的影响取决于度,主要是通过影响脱位动态来作为低水平的阻滞剂.
空洞进化是一个复杂的过程,涉及多个阶段和相互竞争的机制.
温度和度对Fe-H系统的机械性能和结构完整性产生协同作用,温度在高范围占主导地位,而在低范围影响混乱.

关键词:

移位移位移位移位移位原子是原子的组成部分.分子动态模拟分子动态模拟多晶体铁是一种多晶体铁.三轴张力的三轴张力

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