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

+高級檢索
激光區(qū)熔定向凝固Gd5Ge4合金的相選擇與組織特征
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:

教育部博士點(diǎn)基金資助(20096102120015)


Phase Selection and Microstructure Characteristics of Directionally Solidified Gd5Ge4 Alloy by Laser Zone Re-melting
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
    • |
  • 文章評論
    摘要:

    對具有包晶反應(yīng)的Gd5Ge4金屬間化合物進(jìn)行激光區(qū)熔快速定向凝固實(shí)驗(yàn)，研究了Gd基磁致冷材料激光快速定向凝固過程中的相選擇機(jī)制和顯微組織特征。結(jié)果表明，激光區(qū)熔快速定向凝固后的Gd5Ge4合金具有明顯的擇優(yōu)取向，合金在激光快凝條件下同時(shí)發(fā)生非晶化現(xiàn)象。Gd5Ge4合金定向凝固組織的片層間距隨激光掃描速率的增加而減小，合金的凝固組織特征和激光掃描速率的關(guān)系符合J-H模型。

    Abstract:

    The Gd5Ge4 alloy with the peritectic reaction during solidification was prepared by the arc-melt method under protection of argon atmosphere. The as-cast alloys were cut and directionally solidified with the help of laser rapid solidification technique. Microstructure characteristics and phase selection of Gd5Ge4 during the rapid directional solidification by laser zone re-melting were investigated. The microstructure originating from steady-state growth?was evaluated with the help of optical microscope (OM) and X-ray diffraction (XRD). The alloy after laser zone directional solidification possesses obvious preferred orientation and the amorphization occurs under this condition. The cellular spacing could be expressed as a function of the laser scanning velocity during the rapid solidification. An acceptable combination is found between the experimental results and the classical J-H numerical solidification model for a rapid cellular/dendritic growth.

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

張鐵邦,胡 銳,鐘 宏,葛光男,李金山.激光區(qū)熔定向凝固Gd5Ge4合金的相選擇與組織特征[J].稀有金屬材料與工程,2011,40(12):2193~2196.[Zhang Tiebang, Hu Rui, Zhong Hong, Ge Guangnan, Li Jinshan. Phase Selection and Microstructure Characteristics of Directionally Solidified Gd5Ge4 Alloy by Laser Zone Re-melting[J]. Rare Metal Materials and Engineering,2011,40(12):2193~2196.]
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:2011-05-19
  • 最后修改日期:
  • 錄用日期:
  • 在線發(fā)布日期:
  • 出版日期: