Hot Deformation Behavior and Processing Map of Novel Fe-Cr Alloy Containing Aluminum

Sun Shengying; Sun Jinchao; Yang Xin; Liang Shunxing; Zhang Xiliang; Liu Hongji

doi:10.15980/j.tzzz.2024.03.013

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Hot Deformation Behavior and Processing Map of Novel Fe-Cr Alloy Containing Aluminum
Vol. 44, Issue 3, Pages: 359-363(2024)
Published： 20 March 2024 ，
DOI： 10.15980/j.tzzz.2024.03.013

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孙胜英，孙锦超，梁顺星，等. 新型含铝Fe-Cr合金的热变形行为及热加工图［J］. 特种铸造及有色合金，2024，44（3）：359-363.

SUN S Y，SUN J C，LIANG S X，et al. Hot deformation behavior and processing map of novel Fe-Cr alloy containing aluminum［J］. Special Casting & Nonferrous Alloys，2024，44（3）：359-363.
孙胜英，孙锦超，梁顺星，等. 新型含铝Fe-Cr合金的热变形行为及热加工图［J］. 特种铸造及有色合金，2024，44（3）：359-363. DOI： 10.15980/j.tzzz.2024.03.013.

SUN S Y，SUN J C，LIANG S X，et al. Hot deformation behavior and processing map of novel Fe-Cr alloy containing aluminum［J］. Special Casting & Nonferrous Alloys，2024，44（3）：359-363. DOI： 10.15980/j.tzzz.2024.03.013.

摘要

采用Gleeble-3500热模拟试验机对Fe-18Ni-12Cr-3Al合金进行压缩试验，其变形温度为925~1 175 ℃、应变速率为0.01~10 s

-1

。分析了合金真应力-真应变曲线，建立了本构方程及热加工图，并结合

https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=55717994&type=

https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=55717982&type=

1.60866666

2.37066650

https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=55717997&type=

https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=55717985&type=

1.60866666

2.45533323

曲线上的拐点，采用拐点法研究其动态再结晶的临界条件。结果表明，Fe-18Ni-12Cr-3Al合金应力随着应变速率增加和变形温度降低而升高，发生动态再结晶的临界应力和峰值应力之间具有相关性，即

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https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=55717998&type=

14.81666565

3.21733332

。依据热本构方程和热加工图，热激活能为376.1

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https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=55718003&type=

9.31333351

2.79399991

，应变为0.1时的最佳热加工区域是变形温度为1 110～1 160 ℃，应变速率为0.01～1 s

-1

。

Abstract

The compression test was conducted on Fe-18Ni-12Cr-3Al alloy by Gleeble-3500 thermal simulator in temperature range of 925~1 175 ℃ and strain of 0.01~10 s

-1

. The true stress-strain curve was analyzed， and the constitutive equation as well as thermal processing map was established. The critical conditions of dynamic recrystallization were investigated by inflection point method based on

θ-σ

curve. The results indicate that the flow stress of Fe-18Ni-12Cr-3Al alloy is increased significantly with increasing in strain rate and decreasing in deformation temperature. There exits a correlation between the critical stress and peak stress for dynamic recrystallization of the alloy， which is

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https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=55718024&type=

18.03400040

3.72533321

. According to the constitutive equation and thermal processing map， the activation energy

is 376.1 kJ/mol， and the optimal processing domain are determined in temperature range of 1 110~1 160 ℃ and strain of 0.01~1 s

-1

关键词

Fe-18Ni-12Cr-3Al合金热变形行为本构方程热加工图

Keywords

Fe-18Ni-12Cr-3Al AlloyHot Deformation BehaviorConstitutive EquationThermal Processing Map

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WANG M， SUN H Y， ZHOU Z J， et al. Creep behaviors of Fe-18Ni-12Cr based alumina-forming austenitic steels with ultralow carbon［J］. Journal of Materials Science， 2021， 56（7）：9 445-9 457.

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ZU G， LU Y， YAN Y， et al. Effect of temperature and strain rate on the hot deformation behaviors of ferritic stainless steel［J］. Metals and Materials International， 2020， 26（2）：248-259.

POLIAK E I， JONAS J J. A one-parameter approach to determining the critical conditions for the initiation of dynamic recrystallization［J］. Acta Materialia， 1996， 44（1）：127-136.

孙亚丽，谢敬佩，郝世明，等．30%SiCp/2024Al复合材料动态再结晶临界条件［J］．材料热处理学报，2015，36（9）：7-13.

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GUO B， JI H， LIU X， et al. Research on flow stress during hot deformation process and processing map for 316LN austenitic stainless steel［J］. Journal of Materials Engineering & Performance， 2012， 21（7）：1 455-1 461.

SUN S Y， ZHOU Z J， XU S， et al. Hot deformation behavior and processing map of a Fe-25Ni-16Cr-3Al alumina-forming austenitic steel［J］. Materialwissenschaft und Werkstofftechnik， 2018， 49（9）：1 135-1 144.

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