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噴丸處理對GH3535合金900℃恒溫氧化行為的影響
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作者單位:

1.重慶交通大學機電與車輛工程學院;2.中國科學院上海應用物理研究所材料研究部;3.上海交通大學材料科學與工程學院

作者簡介:

通訊作者:

中圖分類號:

TG146.1+5；TG174.2+2

基金項目:

國家自然科學基金(51674237,51771118,u1760110),中國科學院戰(zhàn)略先導專項項目(XDA02004210)


Effect of shot peening on the oxidation behavior of GH3535 alloy at 900 °C
Author:
Affiliation:

1.School of Mechanotronics Vehicle Engineering,Chongqing jiaotong University;2.Divison of Materials Researd, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai;3.School of Materials Sciences and Engineering,Shanghai jiaotong University

Fund Project:

The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)，the Strategic Priority Research Program of the Chinese Academy of Sciences

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    摘要:

    采用不連續(xù)增重法,對噴丸狀態(tài)與非噴丸狀態(tài)GH3535合金900℃恒溫氧化行為進行了對比研究。結果表明,900℃下,噴丸強度0.45Nmm樣品與未噴丸樣品相比,氧化增重降低了79.7%。未噴丸GH3535合金表面氧化產(chǎn)物為NiCr2O4，MoO2，NiMoO4，噴丸狀態(tài)下氧化膜主要由NiO、NiFe2O4、Cr2O3和NiCr2O4組成。噴丸處理后GH3535合金表面產(chǎn)生塑性變形使晶粒細化,位錯密度增加,在合金表層塑性變形區(qū)域的位錯及晶界充當了Cr原子的快速擴散路徑,增加了Cr原子擴散通量,促進Cr向表面擴散形成富Cr氧化物,使得Cr2O3層的更快形成,減少了瞬態(tài)氧化期。

    Abstract:

    The isothermal oxidation behavior of GH3535 alloy before and after shot peening at 900 °C was investigated by using discontinuous increasing weight method. The results show that the samples of Weight gain of the 0.45 Nmm shot peening strength was reduced by 79.7% compared to the unshot sample at 900℃. The main oxide products of unshot GH3535 alloy are NiCr2O4，MoO2，NiMoO4； While the surface oxide film products of GH3535 alloy is composed of NiO, NiFe2O4, Cr2O3 and NiCr2O4 after shot peening treatments. Plastic deformation was performed on the surface of GH3535 alloy and refined the grains due to shot peening The main reason for the increase of Cr atom diffusion flux is that the dislocations and grain boundaries of the plastic deformation zone of the alloy surface act as a fast diffusion path of Cr atoms, and the Cr2O3 layer is more quickly formed, which promotes the diffusion of Cr to the surface to form Cr-rich oxides, and reduce the transient oxidation period

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汪松林,陸燕玲,張繼祥,董安平,周興泰.噴丸處理對GH3535合金900℃恒溫氧化行為的影響[J].稀有金屬材料與工程,2020,49(10):3519~3527.[WangSonglin, Lu Yanling, Zhang Jixiang, Dong Anping, Zhou Xingtai. Effect of shot peening on the oxidation behavior of GH3535 alloy at 900 °C[J]. Rare Metal Materials and Engineering,2020,49(10):3519~3527.]
DOI：10.12442/j. issn.1002-185X.20190870

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  • 收稿日期:2019-10-22
  • 最后修改日期:2019-11-22
  • 錄用日期:2019-11-29
  • 在線發(fā)布日期: 2020-11-04
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