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
放電等離子燒結(jié)預(yù)合金粉末法制備生物醫(yī)用近β鈦合金的組織演變和力學(xué)性能
作者:
作者單位:

1.西北有色金屬研究院 陜西醫(yī)用金屬材料重點(diǎn)實(shí)驗(yàn)室;2.麗水學(xué)院;3.東北大學(xué) 材料織構(gòu)與各向異性教育部重點(diǎn)實(shí)驗(yàn)室

作者簡(jiǎn)介:

通訊作者:

中圖分類號(hào):

基金項(xiàng)目:

NSFC(51801162); Fundamental Research Funds for the Central Universities (No. 02080022117003);


Microstructural evolution and mechanical properties of a biomedical β-Ti alloy produced by spark plasma sintering its prealloyed powder
Author:
Affiliation:

Northwest Institute for Nonferrous Metal Research

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:

    本研究利用放電等離子燒結(jié)(SPS)預(yù)合金粉末的方法,成功制備出生物醫(yī)用的近β鈦合金Ti-25Nb-3Zr-3Mo-2Sn (wt %)。 近β鈦合金的預(yù)合金粉末利用等離子旋轉(zhuǎn)電極法制備,粉末的凝固組織主要是由β相主導(dǎo)的不發(fā)達(dá)的樹枝晶組成,同時(shí)存在少量的β相單晶組織粉末球。1000℃/5min/50MPa條件下的SPS可以完全致密化近β鈦合金的預(yù)合金粉末,并且消除原始的凝固偏析結(jié)構(gòu)。β單相區(qū)固溶處理后,合金組織由β相和α″相組成,合金的拉伸強(qiáng)度達(dá)到815MPa,延伸率達(dá)到14%,同時(shí)具備62GPa較低的彈性模量。進(jìn)一步500℃時(shí)效處理,合金組織中產(chǎn)生大量的納米針狀α相,使得合金的拉伸強(qiáng)度達(dá)到1015MPa,同時(shí)具備較好的延伸率和中等的彈性模量。然而,應(yīng)當(dāng)避免過低的時(shí)效處理溫度,防止脆性ω相的析出。

    Abstract:

    In this study, a biomedical β-Ti alloy Ti?25Nb?3Zr?3Mo?2Sn (wt. %) was fabricated via spark plasma sintering (SPS) its prealloyed powder. The prealloyed powder was produced by a plasma rotating electrode process. The majority of the powder particles had a microstructure composed of β-phase predominant dendrites, while a small fraction of the powder particles had a single crystal microstructure. SPS with a condition of 1000℃/5min/50MPa could just completely densify this β-Ti alloy powder and remove its prior dendritic segregation. After solution treatment, the consolidated alloy had a microstructure consisting of α″ + β phases, and exhibited a good tensile strength of 815 MPa and an optimal elongation of 14%, as well as a low elastic modulus of only 62 GPa. Aging at 500 ℃ brought about high number density of pure nanosized α needles, which renders this alloy a superior tensile strength up to 1015 MPa along with elongation and elastic modulus both acceptable. However, excessively low aging temperature should be avoided, due to the sharp embrittlement induced by nanoscale ω-phase precipitates.

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

麻西群,蘇勇君,牛紅志,孫倩倩,張海瑞,于振濤.放電等離子燒結(jié)預(yù)合金粉末法制備生物醫(yī)用近β鈦合金的組織演變和力學(xué)性能[J].稀有金屬材料與工程,2019,48(10):3095~3101.[Ma Xiqun, Su Junyong, Niu Hongzhi, Sun Qianqian, Zhang Hairui, Yu Zhentao. Microstructural evolution and mechanical properties of a biomedical β-Ti alloy produced by spark plasma sintering its prealloyed powder[J]. Rare Metal Materials and Engineering,2019,48(10):3095~3101.]
DOI：10.12442/j. issn.1002-185X.20180637

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:2018-06-20
  • 最后修改日期:2019-09-19
  • 錄用日期:2018-10-08
  • 在線發(fā)布日期: 2019-11-01
  • 出版日期: