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
AZ31鎂合金中絕熱剪切帶的組織演變規(guī)律
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:

教育部博導(dǎo)基金（20122102110002）；遼寧省自然科學(xué)基金（201206160）


Microstructure Evolution of Adiabatic Shear Bands in AZ31 Magnesium 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:

    為了深入了解鎂合金絕熱剪切帶與裂紋的關(guān)系，進(jìn)而揭示鎂合金在高速?zèng)_擊載荷作用下局部變形絕熱剪切的組織演變規(guī)律，采用分離式Hopkinson壓桿對(duì)AZ31 鎂合金的帽狀式樣進(jìn)行沖擊壓縮實(shí)驗(yàn)，而后利用光學(xué)顯微鏡，掃描電鏡和維氏硬度計(jì)分別對(duì)沖擊后的AZ31試樣進(jìn)行分析。結(jié)果表明，絕熱剪切帶形成于最大剪應(yīng)力方向，隨著沖擊載荷的不斷增加，沿著切應(yīng)力方向上的微孔洞和微裂紋不斷長大，直至彼此相互連接成裂紋，最終導(dǎo)致材料的斷裂。經(jīng)對(duì)剪切帶及周圍組織維氏硬度的測(cè)量發(fā)現(xiàn)，剪切帶內(nèi)細(xì)小晶粒區(qū)的硬度明顯高于周圍組織。

    Abstract:

    In order to have a deep understanding of the relationship between adiabatic shear bands and cracks in magnesium alloys, the split Hopkinson pressure bar (SHPB) was used to study the deformation localization of the hat-shaped AZ31 magnesium alloy specimen under high strain rate impacting. The microstructure and the cracking formed within the adiabatic shear band were observed by OM and SEM, and the microhardness within and around the adiabatic shear band were tested. The results demonstrate that the adiabatic shear band is formed along the maximum shear stress direction. With the increasing of the impact loading, the micro holes form along the adiabatic shear band. When the micro holes are coarsened and connect with each other the crack forms and then the specimen is broken. The micro hardness of the microstructure in the core of the adiabatic shear band is higher than that of the microstructure around the adiabatic shear band.

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

毛萍莉,劉 超,劉 正,席 通,董 陽. AZ31鎂合金中絕熱剪切帶的組織演變規(guī)律[J].稀有金屬材料與工程,2015,44(5):1181~1184.[Mao Pingli, Liu Chao, Liu Zheng, Xi Tong, Dong Yang. Microstructure Evolution of Adiabatic Shear Bands in AZ31 Magnesium Alloy[J]. Rare Metal Materials and Engineering,2015,44(5):1181~1184.]
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:2014-05-22
  • 最后修改日期:
  • 錄用日期:
  • 在線發(fā)布日期: 2015-06-08
  • 出版日期: