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
熱處理對激光選區(qū)熔化成形Inconel 718合金顯微組織結(jié)構(gòu)和力學性能的影響
作者:
作者單位:

1.華南理工大學 國家金屬材料近凈成形工程技術(shù)研究中心;2.廣州昶聯(lián)熱等靜壓材料制造有限公司

作者簡介:

通訊作者:

中圖分類號:

基金項目:

國家自然科學基金重大儀器專項(51627805)；廣東省自然科學基金團隊項目(2015A030312003)；廣東省科技攻關(guān)項目(2014B010129003)


Effect of Heat Treatment on microstructure and mechanical Properties of Inconel 718 alloy fabricated by selective laser melting
Author:
Affiliation:

1.National Engineering Research of Net-Sharp Forming for Metallic Material,South China University of Technology;2.Guangzhou Zoltrix HIP Material Co Ltd,Guangzhou

Fund Project:

  • 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:

    本文主要研究了激光選區(qū)熔化成形Inconel 718合金經(jīng)固溶時效(SA)、均勻化+固溶時效(H+SA)、熱等靜壓+固溶時效(HIP+SA)三種熱處理后顯微組織結(jié)構(gòu)的轉(zhuǎn)變與力學性能之間的關(guān)系。實驗結(jié)果表明,沉積態(tài)試樣的晶粒內(nèi)部存在大量樹枝晶結(jié)構(gòu),枝晶間析出了大量硬脆Laves相。恰當?shù)木鶆蚧幚黼m能促進δ相析出,但無γ "、γ "相,材料強度較低。熱等靜壓(1080 ℃×1480 bar/2 h)能有效消除沉積態(tài)中的Laves相和微孔,經(jīng)隨后SA處理,材料的晶粒明顯細化,晶界趨于平直,且強化相析出,材料的屈服強度、抗拉強度和硬度顯著提高,分別達到1191 MPa、1361 MPa、490(HV0.2),斷后伸長率達13.30 %,在提高材料強度的同時較大程度保留了材料的延展性,獲得良好的綜合力學性能。

    Abstract:

    This paper studies for the effect of solution-aging (SA), homogenization + solution aging (H+SA), Hot isostatic pressing + solution-aging (HIP + SA) three different heat treatments on the microstructure and mechanical properties of selective laser melting (SLM) formed Inconel 718 alloy. The as-built Inconel 718 has a large number of dendritic structures, and there are many brittle Laves phase precipitating among the interdendritic region. The δ phase was prone to precipitate when treated by proper homogenization, but the material can not be strengthened without γ"and γ " phases. Hot isostatic pressing(1080 ℃×1480 bar/2 h) can considerably removed Laves phase and micro pores of the as-fabricated samples, and combine with the solution aging treatment subsequently, it’s conductive to refine the grain size of the as-built samples, flat the grain boundaries, and promote the precipitation of γ "、γ " phase, so HIP+SA treatment significantly increases the strength of Inconel 718 alloy, the mechanical properties of Inconel 718 alloy reached their optimum combination at UTS=1361 MPa, 0.2% YS=1191 Mpa, and HV0.2 =490, and the elongation after breaking is 13.30%.

    參考文獻
    相似文獻
    引證文獻
引用本文

張榮,柳中強,黃嘉豪,朱權(quán)利,肖志瑜.熱處理對激光選區(qū)熔化成形Inconel 718合金顯微組織結(jié)構(gòu)和力學性能的影響[J].稀有金屬材料與工程,2021,50(1):255~262.[Zhang Rong, Liu Zhongqiang, Huang Jiahao, Zhu Quanli, Xiao Zhiyu. Effect of Heat Treatment on microstructure and mechanical Properties of Inconel 718 alloy fabricated by selective laser melting[J]. Rare Metal Materials and Engineering,2021,50(1):255~262.]
DOI：10.12442/j. issn.1002-185X.20200009

復制
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:2020-01-06
  • 最后修改日期:2020-02-17
  • 錄用日期:2020-02-21
  • 在線發(fā)布日期: 2021-02-05
  • 出版日期: