Präparations- und Analysestrategie zur Untersuchung verformungsinduzierter Poren in kaltverformtem Stahl
Präparations- und Analysestrategie zur Untersuchung verformungsinduzierter Poren in kaltverformtem Stahl
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卡尔特韦尔形式斯塔尔中的准备和分析策略
DOI：
10.3139/147.110110
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
F. Bach
中科院分区：
文献类型：
--
作者：
Dennis Faßmann;G. Gershteyn;M. Schaper;F. Bach
材料损伤可由多种微观结构机制中的任何一种引起，例如由于塑性变形导致的气孔的形成。沉淀物，如硬质碳化物和氧化物或软硫化物[1]，通常大小约为10纳米到300纳米，都可能有助于气孔的形成。当硬质析出物周围发生塑性变形时，析出物表面脱离金属基体。然而，在类似的变形下，软沉淀经常形成空洞[2-4]。本文特别研究了铁素体显微组织中硬质析出物上的气孔的识别。在透射电子显微镜(TEM)中，许多效应在识别这些类型的孔中起着作用。在这篇文章中，讨论了可以采用的各种技术和方法，以使识别这种孔隙成为可能。给出了它们在透射电子显微镜中的研究方法，并解释了样品的制备方法。
Material damage may be caused by any of a number of microstructural mechanisms, such as for example due to the formation of pores as a result of plastic deformation. Precipitates such as hard carbides and oxides or soft sulphides [1], which are as a rule ca. 10 nm to 300 nm in size, may all contribute to the formation of pores. When plastic deformation occurs around hard precipitates, the surface of the precipitate breaks away from the metal matrix. Under similar deformation, soft precipitates however often form cavities [2–4]. This article is in particular concerned with the identification of pores at hard precipitates in ferritic microstructures. Numerous effects play a role in the identification of these types of pores in the transmission electron microscope (TEM). In this article the respective techniques and approaches which can be adopted to make it possible to identify such pores are discussed. A methodology for their investigation in the TEM is presented and the method of specimen preparation explained.