Rietveld refinement,microstructure,mechanical properties and oxidation characteristics of Fe-28Mn-xAl-1C(x=10 and 12 wt.%)low-density steels

作     者：Zhen-yi Huang A-long Hou Yue-shan Jiang Ping Wang Qi Shi Qing-yu Hou Xiang-hua Liu 

作者机构：School of Metallurgical EngineeringAnhui University of TechnologyMa'anshan 243002AnhuiChina Key Laboratory of Metallurgical Emission Reduction&Resources RecyclingMinistry of EducationAnhui University of TechnologyMaranshan 243002AnhuiChina Industrial&Commercial CollegeAnhui University of TechnologyMa'anshan 243002AnhuiChina State Key Laboratory of Rolling and AutomationNortheastern UniversityShenyang 110819LiaoningChina 

出 版 物：《Journal of Iron and Steel Research International》 (J. Iron Steel Res. Int.)

年 卷 期：2017年第24卷第12期

页      面：1190-1198页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：funded by the National Natural Science Foundation of China (Grant No.51674004) Education Department of Anhui Province of China (Grant Nos.KJ2016A104 and KJ2017A805) 

主　　题：Low density steel Rietveld method Microstructure Mechanical property Oxidation characteristics 

摘      要：The quantitative relationship between microstructure and properties of austenitic Fe-28Mn-xAl-1C（x=10 and 12 wt.%）low-density steels was evaluated using Rietveld method to refine X-ray diffraction（XRD）*** results showed that a typical three-phase austenitic steel was obtained in the forged Mn28Al10（***-28Mn-10Al-1C）steel,which included about 92.85 wt.% γ-Fe（Mn,Al,C）（austenite）,5.28 wt.%（Fe,Mn）_3AlC_（0.5）（κ-carbide）,and 1.87 wt.% α-Fe（Al,Mn）（ferrite）.For the forged Mn28Al12（***-28Mn-12Al-1C）steel,nevertheless,only about 76.64 wt.% austenite,9.63 wt.%κ-carbide,9.14 wt.%ferrite and 4.59 wt.% Fe_3Al（DO_3）could be ***κ-carbide and DO_3 were mainly distributed in austenite grains and at the interface between austenite and ferrite,*** forged Mn28Al10 steel had a better combination of strength,ductility and specific strength as compared with the forged Mn28Al12 *** ductility of the forged Mn28Al12 steel was far lower than that of the forged Mn28Al10 *** oxidation kinetics of Mn28Al10 steel oxidized at 1323 Kfor 5-25 h had two-stage linear rate laws,and the oxidation rate of the second stage was faster than that of the first *** the oxidation kinetics of Mn28Al12 steel under this condition also had two-stage linear rate laws,the oxidation rate of the second stage was slower than that of the first *** the oxidation temperature increased to 1373K,the oxidation kinetics of the two steels at 5-25 hhad only onestage linear rate law,and the oxidation rates of the two steels were far faster than those at 1323K for5-25 *** oxidation resistance of Mn28Al12 steel was much better than that of Mn28Al10 *** layer formed between the austenite matrix and the oxidation layer of the two Fe-Mn-Al-C steels oxidized at high temperature.