2SO4+25NaCl (質(zhì)量分?jǐn)?shù))熔鹽環(huán)境下的熱腐蝕行為,之后進(jìn)行組織表征和力學(xué)性能測試。結(jié)果表明:隨著熱處理溫度的不斷升高,高溫合金的抗拉極限強度(UTS)和屈服強度(YS)都出現(xiàn)急劇退化,伸長率顯著提高。但在750 ℃條件下,晶界處析出的針狀δ相能提高高溫合金的強度,導(dǎo)致合金出現(xiàn)沿晶脆性斷裂現(xiàn)象,降低了合金的塑性。在650和750 ℃下,腐蝕機理符合II型熱腐蝕,但在850 ℃條件下符合I型熱腐蝕,2種不同類型腐蝕都促進(jìn)了基體δ相的析出。"/>

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
熱腐蝕對GH4169高溫合金 δ 相析出和拉伸性能的影響
作者:
作者單位:

1.中國民航大學(xué) 中歐航空工程師學(xué)院,天津 300300;2.中國汽車技術(shù)研究中心有限公司,天津 300300

作者簡介:

通訊作者:

中圖分類號:

基金項目:

中央高校基本科研業(yè)務(wù)費


Influence of Hot Corrosion on Precipitation of δ Phase and Tensile Properties of GH4169 Superalloy
Author:
Affiliation:

1.Sino-European Institute of Aviation Engineering, Civil Aviation University of China, Tianjin 300300, China;2.China Automotive Technology and Research Center Co., Ltd, Tianjin 300300, China

Fund Project:

Fundamental Research Funds for the Central Universities of Civil Aviation Universities of China (3122019177)

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

    分別在650、750、850 ℃熱處理條件下,研究了高溫合金GH4169在75Na2SO4+25NaCl (質(zhì)量分?jǐn)?shù))熔鹽環(huán)境下的熱腐蝕行為,之后進(jìn)行組織表征和力學(xué)性能測試。結(jié)果表明:隨著熱處理溫度的不斷升高,高溫合金的抗拉極限強度(UTS)和屈服強度(YS)都出現(xiàn)急劇退化,伸長率顯著提高。但在750 ℃條件下,晶界處析出的針狀δ相能提高高溫合金的強度,導(dǎo)致合金出現(xiàn)沿晶脆性斷裂現(xiàn)象,降低了合金的塑性。在650和750 ℃下,腐蝕機理符合II型熱腐蝕,但在850 ℃條件下符合I型熱腐蝕,2種不同類型腐蝕都促進(jìn)了基體δ相的析出。

    Abstract:

    The hot corrosion behavior of the superalloy GH4169 were analyzed in the salt mixture of 75Na2SO4+ 25NaCl (wt%) at 650, 750 and 850 °C for 50, 75 and 100 h. Then the precipitation of δ phase and tensile properties of the superalloy at ambient temperature were investigated. Results show that with increasing the heat treatment temperature, the ultimate tensile strength (UTS) and yield strength (YS) of the alloy exhibit a drastic degradation while elongation improves significantly. The needle-shaped δ phase precipitated at the grain boundaries can enhance the strength of the superalloy, and cause intergranular brittle fracture. As a result, the ductility of the superalloy is reduced after exposure at 750 °C. The corrosion mechanism of the alloy conforms to type-II hot corrosion at 650 and 750 °C while to type-I hot corrosion at 850 °C. Both kinds of corrosion can form a corrosion layer and promote the δ phase precipitation.

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

宋肖肖,周律,李柯,任凱旭,王加余,王鑫.熱腐蝕對GH4169高溫合金 δ 相析出和拉伸性能的影響[J].稀有金屬材料與工程,2021,50(10):3427~3436.[Song Xiaoxiao, Zhou Lv, Li Ke, Ren Kaixu, Wang Jiayu, Wang Xin. Influence of Hot Corrosion on Precipitation of δ Phase and Tensile Properties of GH4169 Superalloy[J]. Rare Metal Materials and Engineering,2021,50(10):3427~3436.]
DOI:10.12442/j. issn.1002-185X. E20200039

復(fù)制
文章指標(biāo)
  • 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:2020-08-19
  • 最后修改日期:2021-01-21
  • 錄用日期:2021-02-03
  • 在線發(fā)布日期: 2021-10-28
  • 出版日期: 2021-10-25