最新色国产精品精品视频,中文字幕日韩一区二区不卡,亚洲有码转帖,夜夜躁日日躁狠狠久久av,中国凸偷窥xxxx自由视频

+高級(jí)檢索
擠壓態(tài)ZM61-Sn合金的顯微組織及高溫力學(xué)性能
DOI:
作者:
作者單位:

重慶大學(xué),重慶大學(xué),重慶大學(xué),重慶大學(xué),重慶大學(xué)

作者簡(jiǎn)介:

通訊作者:

中圖分類號(hào):

基金項(xiàng)目:


Microstructures and elevated temperature mechanical properties of as-extruded ZM61-Sn alloys
Author:
Affiliation:

College of Materials Science and Engineering,Chongqing University,Chongqing,China,College of Materials Science and Engineering,Chongqing University,Chongqing,China,College of Materials Science and Engineering,Chongqing University,Chongqing,China,College of Materials Science and Engineering,Chongqing University,Chongqing,China,National Engineering Research Center for Magnesium Alloys,Chongqing University

Fund Project:

  • 摘要
    • |
  • 圖/表
    • |
  • 訪問統(tǒng)計(jì)
    • |
  • 參考文獻(xiàn)
    • |
  • 相似文獻(xiàn)
    • |
  • 引證文獻(xiàn)
    • |
  • 資源附件
    • |
  • 文章評(píng)論
    摘要:

    利用金相顯微鏡(OM)、X射線衍射(XRD)、掃描電鏡(SEM)和高溫拉伸對(duì)擠壓態(tài)ZM61-xSn(x=2, 4, 8 wt. %)合金的顯微組織，高溫力學(xué)性能和斷裂機(jī)制進(jìn)行了研究。結(jié)果表明添加Sn 元素可有效細(xì)化合金組織且細(xì)化效果隨Sn 含量的增加而增強(qiáng)。擠壓態(tài)ZM61-xSn(x=2, 4, 8 wt. %)合金的平均晶粒尺寸分別為11, 8和4 μm。隨 Sn 含量的增加，合金的力學(xué)性能先升高后降低。 在所有的實(shí)驗(yàn)合金中ZM61-4Sn合金的強(qiáng)度最高，當(dāng)在180 ℃下進(jìn)行拉伸實(shí)驗(yàn)時(shí)，其極限抗拉強(qiáng)度和屈服強(qiáng)度分別為216和173 MPa。合金的延伸率隨Sn 含量的增加而增加，當(dāng)拉伸溫度為300 ℃時(shí)，ZM61-xSn(x=2, 4, 8wt. %)合金的延伸率分別為183.8%, 235.8% 和258.6%。ZM61-4Sn合金具有最好的強(qiáng)度和塑性的結(jié)合。試樣最后的斷裂主要由局部縮頸引起以及試樣的主要斷裂機(jī)制為顯微孔洞的聚集。當(dāng)在260和300 ℃下拉伸時(shí)，合金發(fā)生了不完全的動(dòng)態(tài)再結(jié)晶。

    Abstract:

    Microstructures, elevated temperature mechanical properties and fracture mechanisms of the as-extruded ZM61-xSn (x=2, 4, 8, wt. %) alloys are investigated by optical microscope (OM), X-ray diffraction (XRD), scanning electron microscope (SEM) and high temperature tensile tests. The experimental results reveal that the addition of Sn can refine microstructures and the refinement effect increases with the increase of Sn content. The average grain size of the as-extruded ZM61-xSn (x=2, 4, 8 wt. %) alloys are 11, 8 and 4 μm, respectively. With increasing of Sn amount, the strength of experimental alloys increase at first and decrease afterward. ZM61-4Sn alloy shows the highest strength, which ultimate tensile strength and yield strength are 216 and 173 MPa tested at 180 ℃, respectively. The ductility increasing with the content of Sn increasing, the elongation of as-extruded ZM61-xSn (x=2, 4, 8 wt. %) alloys are 183.8%, 235.8% and 258.6%, respectively, when tensile temperature reaches 300 ℃. The ZM61-4Sn alloy has the optimal coalescent of strength and ductility. The localized necking leads the final fracture of the specimens and the micro-void coalescence is the main fracture mechanical. Incomplete dynamic recrystallization occurs when tensile tests are carried out at 260 and 300 ℃.

    參考文獻(xiàn)
    相似文獻(xiàn)
    引證文獻(xiàn)
引用本文

唐甜,張丁非,胡光山,胥鈞耀,潘復(fù)生.擠壓態(tài)ZM61-Sn合金的顯微組織及高溫力學(xué)性能[J].稀有金屬材料與工程,2017,46(8):2102~2107.[Tang Tian, Zhang Dingfei, Hu Guangshan, Xu Junyao, Pan Fusheng. Microstructures and elevated temperature mechanical properties of as-extruded ZM61-Sn alloys[J]. Rare Metal Materials and Engineering,2017,46(8):2102~2107.]
DOI：[doi]

復(fù)制
文章指標(biāo)
  • 點(diǎn)擊次數(shù):
  • 下載次數(shù):
  • HTML閱讀次數(shù):
  • 引用次數(shù):
歷史
  • 收稿日期:2015-08-03
  • 最后修改日期:2015-09-21
  • 錄用日期:2015-11-18
  • 在線發(fā)布日期: 2017-11-16
  • 出版日期: