| 静态及动态充氢对SM490B纯净钢拉伸性能的作用 |
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| 引用本文： | 洪旗,陈业新.静态及动态充氢对SM490B纯净钢拉伸性能的作用[J].上海金属,2012,34(1):25-28,37. |
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| 作者姓名： | 洪旗 陈业新 |
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| 作者单位： | 上海大学材料研究所,上海,200072 |
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| 基金项目： | 国家自然科学基金，上海市重点学科建设项目 |
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| 摘 要： | 用拉伸的方法研究了静态充氢和动态充氢对SM490B纯净钢力学性能的作用,结果表明:随着充氢电流密度的增加,试样的延伸率连续降低。动态充氢试样的氢致塑性损失明显大于静态充氢拉伸试样的氢致塑性损失。氢原子提高了试样的屈服强度,而试样的抗拉强度随电流密度增大而减小。随着充氢电流密度的增加,静态拉伸试样的断口均为韧窝状,而动态拉伸试样的断口形貌由韧窝状向准解理状变化。
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| 关 键 词： | 静态及动态充氢 SM490B纯净钢 氢损伤 力学性能 |
EFFECTS OF STATIC AND DYNAMIC HYDROGEN CHARGING ON TENSILE PROPERTIES OF SM490B CLEAN STEEL |
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| Hong Qi
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Chen Yexin.EFFECTS OF STATIC AND DYNAMIC HYDROGEN CHARGING ON TENSILE PROPERTIES OF SM490B CLEAN STEEL[J].Shanghai Metals,2012,34(1):25-28,37. |
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| Authors: | Hong Qi Chen Yexin |
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| Affiliation: | Hong Qi Chen Yexin(Institute of Materials Science,Shanghai University,Shanghai 200072,China) |
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| Abstract: | Mechanical properties of SM490B clean steel samples after static hydrogen charging and dynamic hydrogen charging were investigated by tensile tests.The results showed that elongation of the charging specimen dropped continuously with the increasing of charging current density.Elongation loss induced by hydrogen in dynamic hydrogen charging tensile test was larger evidently than that in static hydrogen charging tensile test.The yield strength of the charging sample was increased by hydrogen atoms.Ultimate tensile strength of the charging sample decreased with the increasing of charging current.The fractograph of static charging sample appeared dimple pattern but that of the dynamic charging sample exhibited a change from ductile dimple fracture to cleavage fracture when the charging current increased. |
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| Keywords: | Static and Dynamic Hydrogen Charging SM490B Clean Steel Hydrogen Damage Mechanical Property |
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