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
鈦合金激光快速成形過程中缺陷形成機(jī)理研究
DOI:
作者:
作者單位:

作者簡(jiǎn)介:

通訊作者:

中圖分類號(hào):

TG146.23

基金項(xiàng)目:

國家自然科學(xué)基金重點(diǎn)項(xiàng)目(50335010);國家自然科學(xué)基金(50405038)和西北工業(yè)大學(xué)英才培養(yǎng)計(jì)劃(05XE0131)資助


Research on Forming Mechanism of Defects in Laser Rapid Formed Titanium 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:

    采用微觀測(cè)試分析方法,研究了鈦合金激光快速成形過程中缺陷的形成機(jī)理。結(jié)果發(fā)現(xiàn),成形件內(nèi)部存在兩種類型的缺陷,即氣孔和熔合不良。氣孔形貌星球形,在成形件內(nèi)部的分布具有隨機(jī)性,氣孔是否形成取決于粉末材料的特性,主要是指粉末的松裝密度,氧含量對(duì)氣孔的形成沒有影響。熔合不良缺陷形貌一般呈不規(guī)則狀,主要分布在各熔覆層的層間和道間,熔合不良缺陷是否產(chǎn)生取決于成形特征參量是否匹配,其中最顯著的影響因素是能量密度、多道間搭接率以及Z軸單層行程△Z。

    Abstract:

    The defects forming mechanism in the Laser Rapid Forming(LRF) process of titanium and titanium alloy was studied through microscopic analysis methods.The results showed that there were two kinds of defects,porosity and ill bonding in the laser multi-layer cladding.For the LRF titanium and titanium alloy,the porosity was spherical and randomly distributed in samples due to the low loose density of the powders,and the oxygen content wasn't the factor to influence the porosity rate.The ill bonding tended to be irregular shape and generally occurred between the layers and the line boundaries.The laser energy density,overlap and Z-increment ?Z were main process characteristic parameters to influence the ill bonding.

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

張鳳英 陳靜 譚華 呂曉衛(wèi) 黃衛(wèi)東.鈦合金激光快速成形過程中缺陷形成機(jī)理研究[J].稀有金屬材料與工程,2007,36(2):211~215.[. Research on Forming Mechanism of Defects in Laser Rapid Formed Titanium Alloy[J]. Rare Metal Materials and Engineering,2007,36(2):211~215.]
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:
  • 最后修改日期:2005-12-01
  • 錄用日期:
  • 在線發(fā)布日期:
  • 出版日期: