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
In Situ X-ray Diffraction Study of the Tensile Deformation of U-5.8Nb Alloy
DOI:
作者:
作者單位:

作者簡介:

通訊作者:

中圖分類號(hào):

基金項(xiàng)目:


In Situ X-ray Diffraction Study of the Tensile Deformation of U-5.8Nb Alloy
Author:
Affiliation:

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:

    為了探明a2相U-5.8wt%Nb合金的晶格響應(yīng)和變形特性，對(duì)力學(xué)拉伸加載下的合金變形行為進(jìn)行了原位的X射線衍射（XRD）研究，獲得了合金從彈性變形直至斷裂的過程中晶格對(duì)外加應(yīng)力的響應(yīng)特征。實(shí)驗(yàn)中，每增加一定變形量就對(duì)試樣進(jìn)行原位的XRD分析，用單峰擬合法和Rietveld全譜精修方法處理數(shù)據(jù)，分析了合金變形過程中的晶格演化行為。結(jié)果顯示，拉伸過程中，試樣的晶胞參數(shù)、衍射峰強(qiáng)度和晶面間距都隨外加應(yīng)變有規(guī)律地變化。晶格響應(yīng)分析結(jié)果表明，合金晶胞各方向彈性極限的顯著差異是第一屈服平臺(tái)形成的內(nèi)在原因，該屈服平臺(tái)的變形過程包括了孿生變形和彈性變形2種機(jī)制。利用研究結(jié)果能夠很好地解釋合金的形狀記憶效應(yīng)。

    Abstract:

    The in situ X-ray diffraction (XRD) was used during uniaxial tensile loading to study the lattice response and deformation behavior of a2 U-5.8 wt% Nb (U5.8Nb) alloy. Diffraction patterns were recorded at incremental macroscopic strains until fracture of the sample, and the XRD data were analyzed by Rietveld method and single-peak fitting. The changes regulation of lattice parameter, diffraction peak intensity and interplanar spacing with applied stress during deformation were analyzed. It is found that the elastic deformation and the twinning deformation (reorientation) coexist in the initial stage of the first yield platform. The lattice response suggests that the remarkable anisotropy of elastic limit in various directions should be the genesis of double yield curve.

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

張延志,汪小琳,陳向林,肖大武. In Situ X-ray Diffraction Study of the Tensile Deformation of U-5.8Nb Alloy[J].稀有金屬材料與工程,2015,44(5):1094~1098.[Zhang Yanzhi, Wang Xiaolin, Chen Xianglin, Xiao Dawu. In Situ X-ray Diffraction Study of the Tensile Deformation of U-5.8Nb Alloy[J]. Rare Metal Materials and Engineering,2015,44(5):1094~1098.]
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:2014-05-26
  • 最后修改日期:
  • 錄用日期:
  • 在線發(fā)布日期: 2015-06-08
  • 出版日期: