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精炼12Cr钢高温低周疲劳循环特性试验研究
  • ISSN号：1001-2060
  • 期刊名称：《热能动力工程》
  • 时间：0
  • 分类：TK263[动力工程及工程热物理—动力机械及工程] O346.2[理学—固体力学;理学—力学]
  • 作者机构：[1]华中科技大学能源与动力工程学院,中欧清洁与可再生能源学院,湖北武汉430074
  • 相关基金：国家高技术研究发展计划（863计划）基金资助项目（2008AA042404）;国家自然科学基金资助项目（50505013）、（51021065）、（50975105）
作者： 吕方明[1], 王坤[1], 黄树红[1], 欧阳坤贝[1]
关键词： 精炼12Cr钢, 低周疲劳, 高温, 循环弹性模量, 寿命
中文摘要：

为研究高温寿命损耗过程中材料低周疲劳特性的变化规律，在540℃和593℃下对3种精炼12Cr转子钢进行总应变控制的低周疲劳试验，分析了其循环弹性模量E’、循环强度系数K和循环应变硬化指数n随循环周次变化的规律。试验结果表明：循环初始阶段（N／Nf〈0．1），循环弹性模量E‘迅速变化，多数试样表现为下降趋势，个别试样存在硬化现象；循环稳定阶段（0．1〈N／Nf〈0．8），E^＊较为稳定；循环末期（N／Nf〉0．8），E^＊急剧降低；当Ⅳ／Ⅳf〈0．8时，循环强度系数K和n随循环周次的变化规律均可用系数为正、指数为负的幂函数曲线拟合，寿命损耗过程中，K和n具有相似的变化趋势。同时，控制应变幅和温度对上述3个参数有重要影响。最后，分析了弹性模量劣化对寿命估算的影响，结果表明：与传统寿命估算方法相比，弹性模量修正后的寿命估算精度在较低温度下（540℃）明显提高，而在较高温度时（593℃）精度提高不明显。

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期刊信息
  • 《热能动力工程》
  • 中国科技核心期刊
  • 主管单位:中国船舶重工集团公司
  • 主办单位:中国船舶重工集团公司第七0三研究所
  • 主编：邹积国
  • 地址：哈尔滨香坊区旭升街4-13号明光翡翠湾6号楼3号门市
  • 邮编：150036
  • 邮箱：rndlgch703@163.com
  • 电话：0451-55654932 55637728
  • 国际标准刊号：ISSN：1001-2060
  • 国内统一刊号：ISSN：23-1176/TK
  • 邮发代号:14-158
  • 获奖情况:
  • 中国动力工程类核心期刊,1997年第二届全国优秀科技期刊,录入美国Ei数据库,中国期刊方阵“双效”期刊
  • 国内外数据库收录:
  • 美国化学文摘（网络版）,荷兰文摘与引文数据库,美国剑桥科学文摘,日本日本科学技术振兴机构数据库,中国中国科技核心期刊,中国北大核心期刊（2004版）,中国北大核心期刊（2008版）,中国北大核心期刊（2011版）,中国北大核心期刊（2014版）,中国北大核心期刊（2000版）
  • 被引量:10344