• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>ISIJ international >Effects Of Dynamic Strain Aging On High Temperature Mechanical Proprieties For A Structural Steel Containing Mo And Nb
【24h】

Effects Of Dynamic Strain Aging On High Temperature Mechanical Proprieties For A Structural Steel Containing Mo And Nb

机译：动态应变时效对含钼和铌的结构钢的高温力学性能的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The influence of dynamic strain aging (DSA) on the high temperature strength of a structural steel microal-loyed with Mo and Nb was investigated by means of tensile tests performed at temperatures ranging from 25 to 600℃ and strain rates of 10~(-4) to 10~(-1) s~(-1). This steel showed a ferrite and pearlite microstructure. DSArnmanifestations are less intense than those observed for low carbon steels and they take place at higherrntemperatures. The secondary precipitation behavior of the steel was also investigated. The hardness of samples heat treated at 100 to 600℃ displayed a maximum at 400℃. Samples treated at this temperature and tensile tested at 600℃ didn't showed a higher yield strength than the untreated specimens, indicating that secondary precipitation does not contribute to its high temperature strength. Results obtained here indicated that DSA in the structural steel might be an important mechanism responsible for its fire resistance. The empirical activation energies related to the appearance of serrations on the stress-strain curves and to the maxima on the variation of tensile strength with temperature or disappearance of serrations suggested that the high temperature strengthening associated with DSA in this steel is the dynamic interaction of in-terstitial-substitutional solute dipoles and dislocations.
机译：通过在25至600℃的温度范围内以及10〜（-4）的应变速率下进行的拉伸试验，研究了动态应变时效（DSA）对钼和铌微合金化结构钢的高温强度的影响。 ）至10〜（-1）s〜（-1）。该钢显示出铁素体和珠光体的显微组织。与低碳钢相比，DSA表现出的强度较低，它们在较高的温度下发生。还研究了钢的二次析出行为。在100至600℃热处理的样品的硬度在400℃达到最大值。在此温度下处理并在600℃下进行拉伸测试的样品没有显示出比未处理样品更高的屈服强度，表明二次沉淀对其高温强度没有影响。此处获得的结果表明，结构钢中的DSA可能是导致其耐火性的重要机理。经验活化能与应力-应变曲线上的锯齿的出现以及抗拉强度随温度的变化或锯齿消失的最大值有关，这表明与DSA相关的高温强化是钢中的动态相互作用。取代性溶质偶极和位错。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号