Deformation mechanism as a function of applied load under metal microindentation

Daria Grabco; Diana Leu

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Deformation mechanism as a function of applied load under metal microindentation

机译：金属微压痕作用下变形机制与施加载荷的关系

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The purpose of this paper was to estimate the contribution of applied load values to the development of deformation process during the quasi-static microhardness testing. Water pipes of the commercial iron alloys, steel and cast iron of various diameters (O 25-500 mm) were used for the investigation. It was established that H =f(P) curves for the metal samples can be divided into three specific parts (stages). The existence of those stages indicates that microindentation process occurs in polycrystalline metals due to different mechanisms of plastic deformation. They are: (ⅰ) the translation slip mechanism (microlevel) for the 1st stage; (ⅱ) translation/rotation slip mechanism [mesolevel) for the 2nd stage; (ⅲ) the crystal behaviour similar to a homogenous solid (macrolevel) for the 3rd stage. It was shown that the coexistence of translation and rotation modes leads to their interaction and brings an important contribution into plasticity and brittleness of polycrystalline metals.

机译：本文的目的是评估准静态显微硬度测试过程中施加的载荷值对变形过程发展的贡献。研究使用了各种直径（O 25-500 mm）的商用铁合金，钢和铸铁的水管。已经确定，金属样品的H = f（P）曲线可分为三个特定部分（阶段）。这些阶段的存在表明，由于塑性变形的不同机制，微压痕过程发生在多晶金属中。它们是：（ⅰ）第一阶段的翻译滑动机制（微观）；（ⅱ）第二阶段的平移/旋转滑移机制[中间水平]；（ⅲ）第三阶段的晶体行为类似于均质固体（宏观）。结果表明，平移和旋转模式的共存导致它们的相互作用，并为多晶金属的可塑性和脆性做出了重要贡献。

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《Materials Science and Engineering》 |2010年第26期|p.6987-6996|共10页
作者
Daria Grabco; Diana Leu;
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作者单位

Institute of Applied Physics, Academy of Sciences of Moldova, Chisinau, Republic of Moldova;

Institute of Applied Physics, Academy of Sciences of Moldova, Chisinau, Republic of Moldova;

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原文格式 PDF
正文语种 eng
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关键词
ferrous alloys; microhardness; microstructure; deformation mechanism;

机译：黑色合金显微硬度微观结构变形机制;

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Deformation mechanism as a function of applied load under metal microindentation

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