• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Annual Meeting Exhibition of The Minerals, Metals Materials Society >High Cycle Fatigue Properties of the Zr-Modified AI~Si-Cu-Mg Alloy at Elevated Temperatures
【24h】

High Cycle Fatigue Properties of the Zr-Modified AI~Si-Cu-Mg Alloy at Elevated Temperatures

机译：Zr改性Ai〜Si-Cu-Mg合金高温疲劳性能在升高温度下

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The Al-Si-Cu-Mg alloy with 0.14 wt%Zr addition has been studied against the counterparts of commercially used EN-AC-42000 (A17Si0.5Cu) baseline alloy for the effect of Zr on the high cycle fatigue (HCF) properties at elevated temperatures. It was found that the fatigue life was significantly improved by 8-10 times at the high stress amplitude of 140 MPa in the Zr-modified alloy at all different temperatures. The fatigue strength coefficient, σ'_f, of the baseline alloy was 574.9, 589.8, and 514.8 MPa at 150, 200, and 250 °C, respectively, which was greatly increased to 1412.3, 620.1, and 821.6 MPa for the Zr-modified alloy. The improved fatigue properties could be mainly ascribed to: (1) the refined microstructure, with α-Al grain size decreasing from 335 ± 18 to 253 ±41 urn and the secondary dendrite arm spacing (SDAS) dropping from 39 to 28 urn; (2) the reduced porosity; and (3) the additional precipitates strengthening effect by the Al-Si-Zr-Ti dispersoids.
机译：已经研究了具有0.14wt％Zr的Al-Si-Cu-Mg合金，用于对商业上使用的ZH-AC-42000（A17SI0.5CU）基线合金的对应部分进行了研究，用于Zr对高循环疲劳（HCF）性能的影响在高温下。发现在所有不同温度下，在Zr改性合金中，疲劳寿命在140MPa的高应力幅度下显着提高了8-10倍。基线合金的疲劳强度系数，σ'_f分别为150,200和250℃的574.9,589.8和514.8MPa，其大大增加到Zr改性的1412.3,620.1和821.6MPa合金。改善的疲劳性能主要归因于：（1）精制的微观结构，α-Al晶粒尺寸从335±18至253±41瓮和次级枝条臂间距（SDAs）从39升至28瓮; （2）降低孔隙度; （3）Al-Si-Zr-Ti分散体的另外的沉淀效果。

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