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
剪切應(yīng)力對Ti-6Al-4V合金α相形核及微織構(gòu)形成的影響
作者:
作者單位:

1.中國科學院金屬研究所;2.中國航空綜合技術(shù)研究所

作者簡介:

通訊作者:

中圖分類號:

基金項目:

國家重點研發(fā)計劃“材料基因工程關(guān)鍵技術(shù)與支撐平臺”專項(2016YFB0701304)；中國科學院戰(zhàn)略先導(dǎo)科技專項項目(XDC01040100)；中國科學院信息化專項項目(XXH13506-304)；遼寧省博士啟動基金(20180540133)


The influences of applied shear stress on nucleation and micro-texture formation of α phase in Ti-6Al-4V
Author:
Affiliation:

1.Institute of Metal Research,Chinese Academy of Science;2.AVIC China Aero-Polytechnology Establishment

Fund Project:

The National Key R&D Program of China (2016YFB0701304); the CAS Strategic Priority Research Program (XDC01040100); the CAS Informatization Project (XXH13506-304); the Doctoral Scientific Research Foundation of Liaoning Province (20180540133)

  • 摘要
    • |
  • 圖/表
    • |
  • 訪問統(tǒng)計
    • |
  • 參考文獻
    • |
  • 相似文獻
    • |
  • 引證文獻
    • |
  • 資源附件
    • |
  • 文章評論
    摘要:

    采用相場動力學方法模擬Ti-6Al-4V合金中b→α轉(zhuǎn)變過程，研究鈦合金中不同方向的外加剪切應(yīng)力對α析出相變體形核及微織構(gòu)形成的影響。模型輸入數(shù)據(jù)來自Pandat熱力學與動力學數(shù)據(jù)庫及JmatPro (TTT-Ti)。選取x[101]-y[12-1]-z[-111]坐標系，保持時效溫度不變，分別沿(101)[-111]β或(12-1)[-111]β施加不同大小(10, 30及50 MPa)的正反向切應(yīng)力，考察剪切加載對合金微觀組織演化的影響。結(jié)果表明：過冷度一定時，隨剪切應(yīng)力增大，析出變體與剪切應(yīng)力之間的彈性相互作用在相變過程中逐漸起主要作用，對α相變體的選擇作用逐漸增強；應(yīng)力大小一定時，切應(yīng)力對變體選擇的作用強于正應(yīng)力；沿(101)[-111]β或(12-1)[-111]β方向外加剪切應(yīng)力，正向切應(yīng)力分別促進兩種與一種α變體的選擇，而反向切應(yīng)力均主要選擇一種α變體。因而在b向α轉(zhuǎn)變過程中，切應(yīng)力更有利于α相微織構(gòu)的形成。

    Abstract:

    To investigate the influences of applied shear stress on the nucleation process and micro-texture formation of α precipitates, β→α transformation in Ti-6Al-4V alloy was simulated by phase field method using Pandat software and JmatPro (TTT-Ti) databases as direct input in the model. The effects of applied positive and negative shear stresses (10, 30 and 50 MPa) along (101)[-111]β or (12-1)[-111]β on the microstructure evolution of Ti-6Al-4V alloy were explored under aging at certain temperature. The results show that. with the increase of shear stress, the elastic interaction between applied stress and α variants gradually plays more significant role in determining the microstructure of the system under certain undercooling, t herefore, the selection of α variants is gradually enhanced. It was found that the shear stress has a stronger effect on the variant selection than that of normal stress, therefore maybe more effective on microtexture formation. With the increase of shear stress, two or one type of variant are selected under positive shear, and one type of variant is favored by the negative shear along (101)[-111]β or (12-1)[-111]β respectively.

    參考文獻
    相似文獻
    引證文獻
引用本文

張金虎,徐東生,滕春禹,王皞,李學雄,孫佳,楊銳.剪切應(yīng)力對Ti-6Al-4V合金α相形核及微織構(gòu)形成的影響[J].稀有金屬材料與工程,2020,49(3):939~943.[Zhang Jinhu, Xu Dongsheng, Teng Chunyu, Wang Hao, Li Xuexiong, Sun Jia, Yang Rui. The influences of applied shear stress on nucleation and micro-texture formation of α phase in Ti-6Al-4V[J]. Rare Metal Materials and Engineering,2020,49(3):939~943.]
DOI：10.12442/j. issn.1002-185X.17Ti2019046

復(fù)制
文章指標
  • 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:2019-01-10
  • 最后修改日期:2019-07-12
  • 錄用日期:2019-07-30
  • 在線發(fā)布日期: 2020-04-08
  • 出版日期: