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Influence of cold-rolling reduction on Microstructure and Tensile Properties of Nuclear FeCrAl Alloy with Low Cr and Nb Contents

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Acta Metallurgica Sinica(English Letters) 2022年第12期35卷 2101-2110页

作者： Hui Wang Biao Guo Xuguang An Yu Zhang Science and Technology on Reactor Fuel and Materials Laboratory Nuclear Power Institute of ChinaChengdu 610213China School of Materials Science and Engineering Xihua UniversityChengdu 610039China Interdisciplinary Materials Research Center Institute for Advanced StudyChengdu UniversityChengdu 610106China

FeCrAl alloy is one of the most promising candidates as an accident-tolerant fuel(ATF)cladding ***,the influence of cold-rolling(CR)reduction on microstructure and tensile properties of the as-annealed FeCrAl alloys,with low Cr and Nb contents,is systematically *** the increase in CR reduction,the grain size of FeCrAl alloy is obviously refined after annealing because the increase in stored deformation energy leads to enhanced ***,the large CR reductions result in a severe mixed-grain microstructure,significantly reducing the uniform deformability of the FeCrAl *** dislocation density of the as-annealed FeCrAl alloy decreases with the increase in CR reduction,except for the excessive CR reduction of 50%.Moreover,the Laves phases are crushed and dissolved during CR and annealing,as well as large amounts of refined Laves phases are found after large CR *** pinning effect of the Laves phases can significantly improve the strength of FeCrAl ***,the strengthening mechanisms of FeCrAl alloy consist of fine-grain strengthening,dislocation strengthening and precipitation ***,the FeCrAl alloy,with a CR reduction of 30%,achieves optimal tensile *** study can provide theoretical guidance for the industrial production of the FeCrAl alloy.

关键词： FeCrAl alloy cold-rolling reduction Tensile properties Microstructure evolution Strengthening mechanism

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Effects of cold-rolling reduction on the recrystallization texture and grain boundary of ferritic stainless steel

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Baosteel Technical Research 2011年第2期5卷 59-64页

作者： GU Jinlei DU Wei GU Jiaqing ZHANG Minjuan YU Haifeng JIANG Laizhu School of Material Science and Engineering Shanghai Jiao Tong University Shanghai 200240 China Stainless Steel Technology Center Research Institute Baoshan Iron ＆Steel Co. Ltd. Shanghai 200431 China

The study investigates the effects of cold-rolling reduction on the recrystallization-annealed Nb ＋ Ti stabilized ultra-pure ferritic stainless steel with 21% Cr in regards to its microstructure evolution, grain size,recrystallization texture, and grain boundary characteristic distribution and disorientation angle. The research employed the electron back scattered diffraction technique and its results have shown that the average grain size was reduced and the {111 / 〈 112 〉 component was strengthened,which rotated towards {5541 〈225 〉 and {4451 〈384 〉 ,with an increasing cold-rolling reduction. The number fraction of the low-angle grain boundary and the coincidence site lattice （CSL） boundary ,which was mainly made up of ∑3,∑7∑11 and ∑13b, also increased.

关键词： cold-rolling reduction microstructure texture grain boundary character

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