Effect of aging temperature on microstructure and properties of Monel K500 alloy

Jia Xuemei; Wang Jie; Liu Tingyao; Zheng Huaibei; Wang Qinying; Xi Yuchen; Dong Lijin

doi:10.7513/j.issn.1004-7638.2023.06.022

Volume 44 Issue 6

Dec. 2023

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Jia Xuemei, Wang Jie, Liu Tingyao, Zheng Huaibei, Wang Qinying, Xi Yuchen, Dong Lijin. Effect of aging temperature on microstructure and properties of Monel K500 alloy[J]. IRON STEEL VANADIUM TITANIUM, 2023, 44(6): 160-166. doi: 10.7513/j.issn.1004-7638.2023.06.022

Citation:

Jia Xuemei, Wang Jie, Liu Tingyao, Zheng Huaibei, Wang Qinying, Xi Yuchen, Dong Lijin. Effect of aging temperature on microstructure and properties of Monel K500 alloy[J]. IRON STEEL VANADIUM TITANIUM, 2023, 44(6): 160-166. doi: 10.7513/j.issn.1004-7638.2023.06.022

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Effect of aging temperature on microstructure and properties of Monel K500 alloy

doi: 10.7513/j.issn.1004-7638.2023.06.022

1.
College of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, Sichuan, China
2.
School of Materials Science and Engineering, Changsha University of Science and Technology, Changsha 410114, Hunan, China
3.
Chengdu Advanced Metal Materials Industry Technology Research Institute Co., Ltd., Chengdu 610300, Sichuan, China

Received Date: 2023-02-27
Available Online: 2024-01-11
Publish Date: 2023-12-30

Abstract

Abstract

The heat treatment of solution + aging process was conducted on Monel K500 alloy. For investigating the effect of aging temperature on the microstructure and properties of Monel K500 alloy, the micro-hardness and tensile properties were measured and the microstructure of the samples was analyzed by OM, SEM, TEM and XRD. The results showed that hardening phase of polygonal TiC particles mainly distributed at grain boundaries. Meanwhile, Al content at the grain boundary increases after aging treatment, and precipitation decomposition in the supersaturated solid solution occurred, which caused Al and Ti elements to precipitate in the form of Ni₃ (Al, Ti) second phase. The corrosion products NiO and CuO formed after electrochemical etching. With the increasing aging temperature, the volume fraction of precipitates increases, but the high temperature causes the coarsening of precipitates. So, the strengthening effect firstly increases and then decreases with the increase of aging temperature in the range of 560～700 ℃. After aging treatment at 630 ℃, the hardness (HV) and strength of the Monel K500 alloy can reach the maximum value of 329.26 and 994.56 MPa, respectively. However, the corrosion resistance decreases when alloy subject to aging treatment at this temperature.
- Monel K500 alloy,
- aging treatment,
- temperature,
- microstructure,
- mechanical properties,
- precipitated phase

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References(16)

References

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