Effect of Cerium Addition on the Microstructure and Shape Memory Properties of Austenitic Fe-Mn-Si-Cr-Ni Alloys

被引：0

作者：

da Silva, Rodrigo ^{[1
,2
]}

Baroni, Luis Felipe Sverzut ^{[1
]}

Martins, Claudio Bessera ^{[1
,2
]}

Magalhaes, Danielle Cristina Camilo ^{[1
]}

Vacchi, Guilherme Santos ^{[1
]}

Kliauga, Andrea Madeira ^{[2
]}

Lima, Nelson Batista ^{[3
]}

Otubo, Jorge ^{[3
,4
]}

Della Rovere, Carlos Alberto ^{[1
,2
]}

机构：

[1] Univ Fed Sao Carlos, Dept Mat Engn, Munir Rachid Corros Lab, Rodovia Washington Luis Km 235, BR-13565905 Sao Carlos, SP, Brazil

[2] Univ Fed Sao Carlos, Grad Program Mat Sci & Engn, Sao Carlos, Brazil

[3] Nucl & Energy Res Inst IPEN, BR-05508000 Sao Paulo, SP, Brazil

[4] Technol Inst Aeronaut, Div Mech Engn, Sao Jose Dos Campos, SP, Brazil

来源：

ADVANCED ENGINEERING MATERIALS | 2024年 / 26卷 / 05期

关键词：

austenitic Fe-Mn-Si-Cr-Ni shape memory alloys; Bend tests; Cerium; Microstructures; PACKED MARTENSITIC TRANSFORMATIONS; RECOVERY; CE; BEHAVIOR; VC; PSEUDOELASTICITY; TEMPERATURE; IMPROVEMENT; NBC;

D O I：

10.1002/adem.202301513

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The addition of rare earth elements, such as cerium, to austenitic Fe-Mn-Si-based shape memory alloys has been shown to improve both corrosion resistance and shape recovery. However, the mechanisms underlying the effect of Ce on shape recovery are still unclear. This study investigates the influence of the addition of small amounts of Ce (0.18, 0.42, and 0.96 wt%) on the microstructure and shape recovery of an austenitic Fe-13.50Mn-3.98Si-9.54Cr-4.51Ni alloy. Ce additions induce the formation of a large number of Ce-rich particles, which act as austenitic grain refiners. Both grain refinement and the formation of Ce-rich particles contribute to the strengthening of the matrix at 0.42 wt% Ce addition. In addition, Ce additions alter the MS temperature, which increases with Ce additions. Total shape recovery improves with 0.18 and 0.42 wt% Ce additions, but decreases with 0.96 wt% Ce addition. The beneficial effect of Ce addition in improving the shape recovery of the austenitic Fe-Mn-Si-Cr-Ni alloy is related to the enhancement of the elastic shape recovery component of the total shape recovery. However, the shape memory recovery due to the shape memory effect always decreases with the increase of the Ce content. This study investigates the influence of Ce additions (0.18, 0.42, and 0.96 wt%) on austenitic Fe-Mn-Si-Cr-Ni alloy. Ce induces the formation of Ce-rich particles, grain refinement, and matrix strengthening, particularly at 0.42 wt% Ce. Total shape recovery improves with 0.18 and 0.42 wt% Ce, attributed to the enhanced elastic shape recovery. However, shape memory recovery decreases with increasing Ce addition.image (c) 2023 WILEY-VCH GmbH

引用

页数：11

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