12Mg17相,其余區(qū)域?yàn)棣?Al)和Al2Mg3兩相混合組織。金屬間化合物的存在導(dǎo)致焊縫內(nèi)部顯微硬度明顯高于兩側(cè)母材,接頭的抗拉強(qiáng)度可達(dá)34 MPa,拉伸斷裂位置在近鎂側(cè)焊縫區(qū),為典型的脆性斷裂。"/>

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
6061-T6/AZ31B異種金屬激光焊接接頭組織及性能
DOI:
作者:
作者單位:

西南交通大學(xué) 材料科學(xué)與工程學(xué)院,西南交通大學(xué) 材料科學(xué)與工程學(xué)院,西南交通大學(xué) 材料科學(xué)與工程學(xué)院

作者簡(jiǎn)介:

通訊作者:

中圖分類號(hào):

基金項(xiàng)目:

國(guó)家自然科學(xué)基金資助(項(xiàng)目號(hào)51405398)和中央高校基本科研業(yè)務(wù)費(fèi)專項(xiàng)資金資助(項(xiàng)目號(hào)2682015CX007)


Microstructures and properties of 6061-T6/AZ31B butt joints by laser welding
Author:
Affiliation:

School of Materials Science and Technology,Southwest Jiaotong University,School of Materials Science and Technology,Southwest Jiaotong University,School of Materials Science and Technology,Southwest Jiaotong University

Fund Project:

the National Natural Science Foundation of China (No. 51405398) and Fundamental Research Funds for the Central Universities of China(No. 2682015CX007)

  • 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:

    采用高功率、高速激光焊的方法,實(shí)現(xiàn)了3mm厚6061-T6/AZ31B異種金屬對(duì)接接頭的焊接。利用體視顯微鏡、掃描電鏡及能譜儀對(duì)接頭的宏觀形貌、顯微組織及成分、斷口特征進(jìn)行分析,并測(cè)試了接頭的顯微硬度和抗拉強(qiáng)度。結(jié)果表明,焊縫內(nèi)部近鎂側(cè)焊縫區(qū)及鎂側(cè)熔合區(qū)存在大量Al12Mg17相,其余區(qū)域?yàn)棣?Al)和Al2Mg3兩相混合組織。金屬間化合物的存在導(dǎo)致焊縫內(nèi)部顯微硬度明顯高于兩側(cè)母材,接頭的抗拉強(qiáng)度可達(dá)34 MPa,拉伸斷裂位置在近鎂側(cè)焊縫區(qū),為典型的脆性斷裂。

    Abstract:

    The butt joints of 6061-T6 /AZ31B with a thickness of 3 mm were obtained using laser welding with a high laser power and welding speed. The macro-morphology, microstructure and fracture feature of the joints were analyzed by the stereo microscope, scanning electron microscope (SEM). The composition of microstructure and fracture surface was analyzed by Energy Dispersive Spectrometer (EDS). The microhardness and tensile strength of the joint were tested. The results showed that the content of intermetallic compound was different in different weld region. There was a large amount of intermetallic compounds Al12Mg17 in the weld zone and fusion zone near AZ31B side. The other areas were mostly the mixed structure of α(Al) and Al2Mg3. The presence of intermetallic compounds leaded to the higher hardness of the weld compared to the base metal. The hardness fluctuated in value because of the different intermetallic compounds and their various contents. The tensile strength of 6061-T6/AZ31B dissimilar butt joints by laser welding was up to 34 MPa. It was found that the fracture always occurred in weld zone near AZ31B side, and the fracture mode was typical brittle fracture.

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

朱宗濤,薛珺予,陳輝.6061-T6/AZ31B異種金屬激光焊接接頭組織及性能[J].稀有金屬材料與工程,2017,46(7):1977~1982.[Zhu Zongtao, Xue Junyu, Chen Hui. Microstructures and properties of 6061-T6/AZ31B butt joints by laser welding[J]. Rare Metal Materials and Engineering,2017,46(7):1977~1982.]
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:2016-08-06
  • 最后修改日期:2016-12-20
  • 錄用日期:2017-01-06
  • 在線發(fā)布日期: 2017-11-14
  • 出版日期: