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
Ni-Cr-W系高溫合金組織及高溫拉伸變形行為的研究
DOI:
作者:
作者單位:

作者簡(jiǎn)介:

通訊作者:

中圖分類(lèi)號(hào):

基金項(xiàng)目:

新世紀(jì)優(yōu)秀人才計(jì)劃資助項(xiàng)目(08GE1213)


Microstructure and Tensile Behavior of Ni-Cr-W Base Superalloys at Elevated Temperatures
Author:
Affiliation:

Fund Project:

  • 摘要
    • |
  • 圖/表
    • |
  • 訪(fǎng)問(wèn)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:

    采用光學(xué)顯微鏡、掃描電鏡、透射電鏡和高溫拉伸試驗(yàn)機(jī)系統(tǒng)地研究了固溶強(qiáng)化Ni-Cr-W系變形高溫合金組織形貌及200~900 ℃范圍合金的拉伸變形行為。結(jié)果表明，固溶強(qiáng)化Ni-Cr-W系高溫合金由奧氏體基體和M6C組成，組織中存在大量的堆垛層錯(cuò)。在650 ℃以下隨溫度的升高合金的抗拉強(qiáng)度和屈服強(qiáng)度緩慢減小，在650 ℃以上合金的抗拉強(qiáng)度迅速減小，屈服強(qiáng)度基本不變；在650 ℃以下延伸率和斷面收縮率變化較小，在650 ℃以上則迅速增大。形變孿晶是導(dǎo)致在400~700 ℃范圍內(nèi)出現(xiàn)鋸齒狀應(yīng)力-應(yīng)變曲線(xiàn)的主要因素。合金斷裂方式為韌性韌窩斷裂，裂紋主要在γ/M6C結(jié)合界面處產(chǎn)生

    Abstract:

    The microstructure and the tensile deformation behavior between 200 °C and 900 °C of solution strengthened Ni-Cr-W base superalloy were studied by OM, SEM, TEM and a high temperature tensile testing machine. The results show that there are only two phases of γ and M6C in the matrix. Lots of stacking faults are formed in the superalloy microstructure. With the increasing temperature, ultimate tensile strength and yield strength decrease slowly when the temperature is below 650 °C. When the temperature is above 650 °C, ultimate tensile strength decrease rapidly and yield strength almost keep invariable. The elongation and reduction in cross-section of the superalloy change little below 650 °C, but both of them increase rapidly when the temperature is higher than 650 °C. Serration stress-strain curves are induced by mechanical twins mechanism in the temperature range of 400~700 °C. The fracture is of ductile dimple fracture mode. The cracks are initiated mainly in the interface between γ and M6C

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

柏廣海,李金山,胡 銳,薛祥義,馬 健,胡勝天,傅恒志. Ni-Cr-W系高溫合金組織及高溫拉伸變形行為的研究[J].稀有金屬材料與工程,2011,40(7):1300~1304.[Bai Guanghai, Li Jinshan, Hu Rui, Xue Xiangyi, Ma Jian, Hu Shengtian, Fu Hengzhi. Microstructure and Tensile Behavior of Ni-Cr-W Base Superalloys at Elevated Temperatures[J]. Rare Metal Materials and Engineering,2011,40(7):1300~1304.]
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:2010-07-15
  • 最后修改日期:
  • 錄用日期:
  • 在線(xiàn)發(fā)布日期:
  • 出版日期: