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首页> 外文期刊>Journal of Materials Engineering and Performance >The Effect of Severe Plastic Deformation on the Corrosion Resistance of AISI Type 304L Stainless Steel
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The Effect of Severe Plastic Deformation on the Corrosion Resistance of AISI Type 304L Stainless Steel

机译：严重塑性变形对AISI型304L不锈钢耐腐蚀性的影响

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摘要

The AISI type 304L stainless steel (SS) was solution annealed at 1050 degrees C and cryo-rolled at liquid nitrogen (L-N-2) temperature (77 K) under severe plastic deformation (SPD). The thickness reduction through cryo-rolling plastic deformation was carried out up to 90% (designated as CR-90) of initial thickness. The cryo-rolling during rolling at liquid N(2)temperature (77 K), resulted in transformation induced plastic deformation of the austenite gamma-phase into alpha'- martensite phase. The phase transformation was characterized by x-ray diffraction (XRD) and saturation magnetization (M-s) measurement. The microstructure was measured by using optical microscopy (OM), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The XRD peak positions confirmed the martensite (alpha') phase formation. Saturation magnetization (Ms) value of the cryo-rolled specimens shows increasing linearity with cryo-rolling, and transformed to bct martensite (alpha'). The measured corrosion rate of the cryo-rolled specimens as per ASTM A-262 practice-C test (Huey test) ranges from 6.6 mpy or 0.167 mm/yr (CR 0) to 12.9 mpy or 0.328 mm/yr (CR 90), indicating the effects of severe deformation of strain-induced martensite with the cryo-rolling. Further, the role of severe deformation of strain-induced martensite with the cryo-rolling on AISI type 304L SS and also influence on the corrosion resistance are investigated in detail. The deformation microstructure roles, i.e., the phases and volume percentage induced by the different percentage of the cryo-rolling that influences the corrosion resistance properties and corresponding corrosion resistance in nitric acid have been investigated.
机译：AISI型304L不锈钢（SS）在溶液在1050℃下退火并在严重的塑性变形（SPD）下在液氮（L-N-2）温度（77K）下卷起。通过冷冻塑料变形的厚度降低高达90％（指定为CR-90）的初始厚度。在液体N（2）温度（77K）处轧制期间的冷冻轧制导致奥氏体γ相的转化诱导塑性变形成α-马氏体相。相变的特征在于X射线衍射（XRD）和饱和磁化强度（M-S）测量。通过使用光学显微镜（OM），扫描电子显微镜（SEM）和透射电子显微镜（TEM）测量微观结构。 XRD峰位置确认了马氏体（α）相形成。冷冻卷样本的饱和磁化（MS）值表明，用冷冻轧制增加线性，并转化为BCT马氏体（alpha'）。根据ASTM A-262实践-C测试（Huey测试）测量的低温卷样标本的腐蚀速率从6.6 mpy或0.167 mm / Yr（Cr 0）到12.9 mpy或0.328 mm / Yr（CR 90），表明应变诱导马氏体与低温轧制的严重变形的影响。此外，详细研究了在AISI型304LS上进行低温轧制的应变诱导的马氏体的严重变形的作用以及对耐腐蚀性的影响。已经研究了通过影响耐腐蚀性和对应硝酸的相应耐腐蚀性的低温轧制的不同百分比诱导的变形微观结构作用。

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