1的析出。Ce和Zr共同添加合金與單一添加Ce合金相比,由于相對較少的Cu被束縛在尺寸較小的AlCuCe彌散體中,該合金基體中的Cu過飽和度在固溶淬火后相對更高。因此,Al-Cu-Li-Ce-Zr合金與Al-Cu-Li-Ce合金相比較其析出相種類向T1轉(zhuǎn)變,尺寸變得更小,晶粒更加細(xì)化導(dǎo)致了該合金在峰時效時抗拉強度,屈服強度分別相對提高了19.6%和16.1%并具有與之相當(dāng)?shù)难由炻省?/>

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
Ce和Zr對新型Al-Cu-Li合金力學(xué)性能與組織的影響
DOI:
作者:
作者單位:

中南大學(xué),中南大學(xué),中南大學(xué)

作者簡介:

通訊作者:

中圖分類號:

基金項目:

總裝備部重點基金項目（6140506）；山東省科技發(fā)展計劃項目(No. 2014GGX102006）


The Effect of Cerium and Zirconium Microalloying Additions on the Microstructure and Mechanical Properties of a Novel Al–Cu–Li Alloy
Author:
Affiliation:

School of Materials Science and Engineering,Central South University,School of Materials Science and Engineering,Central South University,School of Materials Science and Engineering,Central South University

Fund Project:

  • 摘要
    • |
  • 圖/表
    • |
  • 訪問統(tǒng)計
    • |
  • 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:

    本文通過微觀觀察和拉伸測試的手段,對比研究了在一種高Cu/Li比的新型Al–5.8wt%Cu–1.3wt%Li合金中分別加入Ce, Zr或者兩者共同添加對其合金的微觀組織與力學(xué)性能的影響。微觀觀察表明：當(dāng)Ce和Zr共同添加合金與單一添加Ce或者Zr的合金比較,金屬間化物彌散體由粗大的多邊形顆粒轉(zhuǎn)變成無規(guī)則的細(xì)小粒子,相應(yīng)的拉伸斷口斷裂模式由脆性的沿晶斷裂向塑性穿晶斷裂轉(zhuǎn)變。進(jìn)一步微觀分析表明：Ce的添加促進(jìn)了Al-Cu-Li合金中主要強化相T1的析出。Ce和Zr共同添加合金與單一添加Ce合金相比,由于相對較少的Cu被束縛在尺寸較小的AlCuCe彌散體中,該合金基體中的Cu過飽和度在固溶淬火后相對更高。因此,Al-Cu-Li-Ce-Zr合金與Al-Cu-Li-Ce合金相比較其析出相種類向T1轉(zhuǎn)變,尺寸變得更小,晶粒更加細(xì)化導(dǎo)致了該合金在峰時效時抗拉強度,屈服強度分別相對提高了19.6%和16.1%并具有與之相當(dāng)?shù)难由炻省?/p>

    Abstract:

    Effects of Ce and Zr microalloying additions on the microstructure and tensile property of novel Al–5.8wt% Cu–1.3wt% Li alloys with an elevated Cu/Li ratio were investigated comparatively by microscopy methods and tensile tests. The microstructural observation showed that the intermetallic dispersoid was significantly refined from coarse polygonal shape to fine irregular particle with combinative addition of Ce and Zr compared to single addition of Ce or Zr. Due to the refinement and modification of intermetallic dispersoid， the fracture mode changed from brittle intergranular fracture to ductile transgranular fracture during tensile. In addition, microstructural analysis revealed that the addition of Ce promoted the precipitation of the T1 phase which was the predominant strengthen phase in Al-Cu-Li alloy. In comparison to Ce containing Al-Cu-Li alloy, Ce Zr-containing Al-Cu-Li alloy has raised the degree of supersaturation of Cu in matrix attributed to less Cu atom had been trapped in finer AlCuCe dispersoid after solution treatment. Thus it was found that the ultimate tensile strength (UTS) and yield strength (YS) increased by 19.6% and 16.1% respectively and with almost similar elongation (El), attributed to decreasing of the phase size, changing of precipitation type to T1 phase only and further grain refinement in Ce Zr-containing Al-Cu-Li alloy.

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

余鑫祥,尹登峰,余志明. Ce和Zr對新型Al-Cu-Li合金力學(xué)性能與組織的影響[J].稀有金屬材料與工程,2016,45(8):1917~1923.[Yu Xinxiang, yin deng feng, Yu Zhiming. The Effect of Cerium and Zirconium Microalloying Additions on the Microstructure and Mechanical Properties of a Novel Al–Cu–Li Alloy[J]. Rare Metal Materials and Engineering,2016,45(8):1917~1923.]
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:2015-06-09
  • 最后修改日期:2015-08-09
  • 錄用日期:2015-09-07
  • 在線發(fā)布日期: 2016-10-09
  • 出版日期: