多组元铁基非晶复合材料的力学性能研究

兰州理工大学学报 ›› 2021, Vol. 47 ›› Issue (6): 1-5.

• 材料科学与工程 • 下一篇

多组元铁基非晶复合材料的力学性能研究

赵燕春^*1,2,李泽锋¹,王博¹,寇生中^1,2,李文生^1,2

1.兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室, 甘肃兰州 730050;
2.兰州理工大学材料科学与工程学院, 甘肃兰州 730050

出版日期:2021-12-28 发布日期:2021-12-28
通讯作者: 赵燕春(1984-),女,山东菏泽人,博士,教授.Email:zhaoyanchun@lut.edu.cn
基金资助:
国家自然科学基金(52061027,51661017),甘肃省杰出青年基金(17JR5RA108)

Research on mechanical properties of multi-component iron-based amorphous composite

ZHAO Yan-chun^1,2, LI Ze-feng¹, WANG Bo¹, KOU Sheng-zhong^1,2, LI Wen-sheng^1,2

1. State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou Univ. of Tech., Lanzhou 730050, China; 2. College of Materials Science and Engineering, Lanzhou Univ. of Tech., Lanzhou 730050, China

Online:2021-12-28 Published:2021-12-28

摘要/Abstract

摘要： 采用真空感应水冷铜坩埚磁悬浮熔炼以及负压铜模吸铸法制备了Fe-15Mn-5Si-10Cr-xC(x=0.6~1.0)铁基非晶合金复合材料,由C元素含量变化调控合金的热力学参数,分析其组织和室温力学行为变化.结果表明:随着C含量的增加,合金的原子尺寸差δ增大,混合熵ΔS_mix提高,混合焓ΔH_mix降低.合金铸态组织由非晶相和过冷γ-Fe奥氏体相组成,在压应力加载过程中发生马氏体相变并表现出显著的加工硬化.Fe-15Mn-5Si-10Cr-0.9C合金的ΔS_mix和ΔH_mix分别为1.13 RJ·mol^－1·K^－1和－19.6 kJ·mol^－1,其综合力学性能优异,屈服强度、断裂强度和塑性应变分别为1 300、2 378 MPa和17.2%.

关键词: 非晶复合材料, 热力学参数, 组织结构, 力学性能

Abstract: Fe-15Mn-5Si-10Cr-xC(x=0.6~1.0) amorphous alloy composites were prepared by vacuum magnetic levitation melting water-cooled copper crucible negative pressure copper mold suction casting method. The thermodynamic parameters of Fe-15Mn-5Si-10Cr-xC(x=0.6~1.0) alloy was adjusted by changing the content of C element. And the microstructure and mechanical properties of the alloys were studied. The results show that adding the C elements, the atom size difference δ increases, the mixing entropy ΔS_mix improves while the mixing enthalpy ΔH_mix reduces. The as cast microstructure of the alloy is composed of amorphous phase and undercooled γ-Fe austenite phase. Martensitic transformation occurs and work hardening is obvious during compressive stress loading. The ΔS_mix and ΔH_mix of the Fe-15Mn-5Si-10Cr-0.9C alloy are 1.13RJ·mol^－1·K^－1and －19.6 kJ·mol^－1, respectively. And the compressive yield strength, fracture strength and the plastic strain are up to 1 300, 2 378 MPa and 17.2%.

Key words: amorphous composite, thermodynamic parameter, microstructure, mechanical properties

中图分类号:

TG139.8

赵燕春,李泽锋,王博,寇生中,李文生. 多组元铁基非晶复合材料的力学性能研究[J]. 兰州理工大学学报, 2021, 47(6): 1-5.

ZHAO Yan-chun, LI Ze-feng, WANG Bo, KOU Sheng-zhong, LI Wen-sheng. Research on mechanical properties of multi-component iron-based amorphous composite[J]. Journal of Lanzhou University of Technology, 2021, 47(6): 1-5.

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多组元铁基非晶复合材料的力学性能研究

Research on mechanical properties of multi-component iron-based amorphous composite

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