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
電子束焊熱作用對DD407單晶熔凝區(qū)裂紋形成的影響
DOI:
作者:
作者單位:

南昌航空大學(xué),南昌航空大學(xué),南昌航空大學(xué),南昌航空大學(xué),哈爾濱工業(yè)大學(xué)

作者簡介:

通訊作者:

中圖分類號:

基金項目:

國家自然科學(xué)基金項目（面上項目，重點項目，重大項目）


Effect of electron beam welding thermal on crack formation in fused region of single crystal superalloys DD407
Author:
Affiliation:

Nanchang Hangkong University,Nanchang Hangkong University,Nanchang Hangkong University,Nanchang Hangkong University,Harbin Institute Of Technology

Fund Project:

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

    使用電子束焊對DD407單晶高溫合金進行焊接，采用光學(xué)顯微鏡和掃描電鏡觀察分析了熔凝區(qū)裂紋形態(tài)及分布特征，采用EDS測定了試樣枝晶干與枝晶間區(qū)域的化學(xué)成分，計算了元素的偏析比并分析了裂紋形成原因。結(jié)果表明：在電子束熱作用下，DD407單晶熔凝區(qū)中主要產(chǎn)生縱向裂紋、橫向裂紋、弧坑裂紋、晶間裂紋，當(dāng)其它工藝參數(shù)不變時，熔凝區(qū)凝固裂紋含量隨著電子束流的增大而先增大后減小；DD407單晶在焊接凝固過程中，雜晶區(qū)合金元素偏析嚴(yán)重，導(dǎo)致低熔點共晶組織聚集并形成低熔點液態(tài)薄膜，在凝固收縮拉應(yīng)力作用下，使得雜晶區(qū)常形成凝固裂紋。

    Abstract:

    Nickle base single crystal superalloys DD407 were welded by electron beam welding. the morphology and distribution of crack were analyzed by optical microscopy and scanning electron microscopy. the chemical component between dendrite dry and interdendritic area was measured by EDS. the segregation ration of elements was calculated and the causes of crack formation was analyzed. The results show that: longitudinal cracks, transverse cracks, crater cracks, intergranular cracks mainly were produced in fused region of DD407 under the thermal effect of the electron beam. With the increasing of electron beam current, the content of solidification cracks increase firstly and then decrease when other parameters remain unchanged. low melting point eutectics gather and form a low-melting liquid films due to the serious segregation of alloying elements in miscellaneous grain zone,thus the solidification cracks are often formed in miscellaneous grain zone in the solidification shrinkage tensile stress.

    參考文獻
    相似文獻
    引證文獻
引用本文

黃永德,曾志強,蔡祖鵬,陳玉華,何鵬.電子束焊熱作用對DD407單晶熔凝區(qū)裂紋形成的影響[J].稀有金屬材料與工程,2017,46(7):1920~1923.[huangyongde, zengzhiqiang, caizupeng, chenyuhua, hepeng. Effect of electron beam welding thermal on crack formation in fused region of single crystal superalloys DD407[J]. Rare Metal Materials and Engineering,2017,46(7):1920~1923.]
DOI：[doi]

復(fù)制
文章指標(biāo)
  • 點擊次數(shù):
  • 下載次數(shù):
  • HTML閱讀次數(shù):
  • 引用次數(shù):
歷史
  • 收稿日期:2015-03-30
  • 最后修改日期:2015-05-09
  • 錄用日期:2015-06-11
  • 在線發(fā)布日期: 2017-11-14
  • 出版日期: