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首页> 外文期刊>Journal of Materials Engineering and Performance >Strain-Induced Martensite Formation and Recrystallization Behavior in 304 Stainless Steel
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Strain-Induced Martensite Formation and Recrystallization Behavior in 304 Stainless Steel

机译：304不锈钢中的应变诱发马氏体形成和再结晶行为

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摘要

The effect of recrystallization on the evolution of microstructure, texture, and mechanical properties has been examined in an AISI 304 stainless steel, subjected to strain-induced alpha'-martensite transformation and subsequent annealing. Samples were processed by cold rolling and subzero rolling to induce different amounts of alpha'-martensite, using three reductions of 20, 40, and 60%, and later solution annealed to ensure complete recrystallization. Large transformation to alpha'-martensite occurred for subzero-rolled samples at low reduction (20%), while only a gradual increase of alpha'-martensite in cold-rolled samples took place with the increasing rolling reduction. Results from electron back-scattered diffraction indicate that annealing of cold-rolled samples produces finer recrystallized grains with increasing rolling reduction, while the predominant formation of alpha'-martensite in subzero-rolled microstructures is believed to have strong effect on the production of similar grain size upon annealing. Twin-related I 3 pound boundaries were formed during annealing with maximum fraction of 53%. These boundaries become longer, straighter, and less incorporated into grain boundary network with the increasing rolling reduction and/or using subzero rolling, demonstrating an indirect mechanism of grain boundary engineering. Also, annealing caused scattering around the rolling texture components (Brass, Goss, S, and Copper) and the recrystallization textures become more random with the increasing rolling reduction and/or using subzero rolling. Nevertheless, recrystallization textures of samples reduced by 60% show formation of Cube and Dillamore orientations and strengthening of Brass orientation. This is thought to contribute to the enhancement of the tensile strength and microhardness of annealed samples.
机译：已经在AISI 304不锈钢中检查了重结晶对微观结构，织构和机械性能演变的影响，并对其进行了应变诱导的α'-马氏体转变和随后的退火处理。通过冷轧和零度以下轧制对样品进行处理，使用20％，40％和60％的三种压下量来诱导不同量的α'-马氏体，然后对溶液进行退火以确保完全重结晶。零轧制样品在低压下率（20％）发生了向α'-马氏体的大转变，而随着冷轧压下率的增加，冷轧样品中只有α'-马氏体逐渐增加。电子背散射衍射的结果表明，冷轧样品的退火会随着轧制压下量的增加而产生更细的重结晶晶粒，而据信在零以下轧制的微观结构中主要形成α'马氏体对相似晶粒的产生有很大影响退火后的尺寸。在退火过程中形成了孪晶相关的I 3磅边界，最大分数为53％。随着轧制压下量的增加和/或使用零下轧制，这些边界变得更长，更直，并且更少地结合到晶界网络中，这证明了晶界工程的间接机制。同样，退火会引起轧制织构成分（黄铜，戈斯，S和铜）周围的散射，并且随着轧制减少量的增加和/或使用零下轧制，重结晶织构变得更加随机。然而，样品的再结晶织构减少了60％，显示出立方和迪拉摩取向的形成以及黄铜取向的增强。认为这有助于提高退火样品的拉伸强度和显微硬度。

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