Effect of precipitates on martensite formation and shape memory effect of FeMnSi-based shape memory alloys fabricated by laser powder bed fusion

IF 6.1 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: A Pub Date : 2024-11-26 DOI:10.1016/j.msea.2024.147592

I. Ferretto , A. Sharma , D. Kim , N.M. Della Ventura , J. Michler , J. Capek , E. Polatidis , W.J. Lee , C. Leinenbach

{"title":"Effect of precipitates on martensite formation and shape memory effect of FeMnSi-based shape memory alloys fabricated by laser powder bed fusion","authors":"I. Ferretto , A. Sharma , D. Kim , N.M. Della Ventura , J. Michler , J. Capek , E. Polatidis , W.J. Lee , C. Leinenbach","doi":"10.1016/j.msea.2024.147592","DOIUrl":null,"url":null,"abstract":"<div><div>The initial and evolving microstructure during the tensile test of two Fe-17Mn-5Si-10Cr-4Ni shape memory alloys, with and without V, C and fabricated by laser powder bed fusion are investigated and compared via electron backscattered diffraction, transmission electron microscopy and in-situ neutron diffraction. Tensile samples are fabricated from the two alloys in order to analyze their thermo-mechanical properties. The addition of V and C leads to the formation of a high area density of fine precipitates, mainly carbides, after heat treatment. The chemistry modifications caused by carbide precipitation cause a decrease in the stacking fault energy (SFE), promoting the formation of wider stacking faults and higher volume fractions of martensite phase under loading, which affect the pseudo-elastic properties and deformation behavior of the material. The carbide-containing alloy shows higher strength, work-hardening capability and pseudo-elasticity compared to the carbide-free alloy. However, the shape memory effect is reduced in the former. The present work sheds light on the crucial role of alloy composition, precipitation and SFE in shaping the mechanical and shape memory properties of Fe-based shape memory alloys. The findings hold potential implications for the design and optimization of materials for specific engineering applications, where either enhanced pseudoelasticity or shape memory effect is desired.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"921 ","pages":"Article 147592"},"PeriodicalIF":6.1000,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials Science and Engineering: A","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0921509324015235","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

The initial and evolving microstructure during the tensile test of two Fe-17Mn-5Si-10Cr-4Ni shape memory alloys, with and without V, C and fabricated by laser powder bed fusion are investigated and compared via electron backscattered diffraction, transmission electron microscopy and in-situ neutron diffraction. Tensile samples are fabricated from the two alloys in order to analyze their thermo-mechanical properties. The addition of V and C leads to the formation of a high area density of fine precipitates, mainly carbides, after heat treatment. The chemistry modifications caused by carbide precipitation cause a decrease in the stacking fault energy (SFE), promoting the formation of wider stacking faults and higher volume fractions of martensite phase under loading, which affect the pseudo-elastic properties and deformation behavior of the material. The carbide-containing alloy shows higher strength, work-hardening capability and pseudo-elasticity compared to the carbide-free alloy. However, the shape memory effect is reduced in the former. The present work sheds light on the crucial role of alloy composition, precipitation and SFE in shaping the mechanical and shape memory properties of Fe-based shape memory alloys. The findings hold potential implications for the design and optimization of materials for specific engineering applications, where either enhanced pseudoelasticity or shape memory effect is desired.

查看原文本刊更多论文

沉淀物对激光粉末床熔合法制备femnsi基形状记忆合金马氏体形成及形状记忆效应的影响

采用电子背散射衍射、透射电镜和原位中子衍射等方法，研究了激光粉末床熔合法制备的两种Fe-17Mn-5Si-10Cr-4Ni形状记忆合金在加入和不加入V、C的情况下的初始和演化组织。制备了两种合金的拉伸试样，分析了两种合金的热力学性能。V和C的加入导致热处理后形成高面积密度的细小析出物，主要是碳化物。碳化物析出引起的化学改性导致层错能（SFE）降低，促使层错形成更宽的层错和更高体积分数的马氏体相，从而影响材料的伪弹性性能和变形行为。与不含碳化物的合金相比，含碳化物合金具有更高的强度、加工硬化能力和伪弹性。而前者的形状记忆效应减弱。本研究揭示了合金成分、沉淀和SFE对铁基形状记忆合金力学性能和形状记忆性能的影响。这些发现对特定工程应用中材料的设计和优化具有潜在的意义，在这些应用中，需要增强的伪弹性或形状记忆效应。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Materials Science and Engineering: A 工程技术-材料科学：综合

CiteScore

11.50

自引率

15.60%

发文量

1811

审稿时长

31 days

期刊介绍： Materials Science and Engineering A provides an international medium for the publication of theoretical and experimental studies related to the load-bearing capacity of materials as influenced by their basic properties, processing history, microstructure and operating environment. Appropriate submissions to Materials Science and Engineering A should include scientific and/or engineering factors which affect the microstructure - strength relationships of materials and report the changes to mechanical behavior.