New Metallographic Method for Estimation of Ordering and Lattice Parameter in Ternary Eutectic Systems

New Metallographic Method for Estimation of Ordering and Lattice Parameter in Ternary Eutectic Systems
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估算三元共晶体系有序和晶格参数的新金相方法

DOI:
10.1007/s13632-013-0072-x
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发表时间:
2013
期刊:
Metallography, Microstructure, and Analysis
影响因子:
--
通讯作者:
B. Nestler
B. Nestler
中科院分区:
--
文献类型:
--
作者:
A. Dennstedt;L. Ratke;A. Choudhury;B. Nestler

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三元共晶组织随凝固条件的不同而变化。本文描述了一种分析凝固后金相切片中三相排列的新方法,该方法提供了一个明确的相间间距和有序度的定义。在确定每个相区的质心之后,计算相区之间的距离和角度。这些数据的极图可以很容易地确定间距和顺序。用实验和模拟的显微组织图像对新方法进行了讨论。它首先在人工相排列上进行测试,人工相排列是完全有序的、半有序的或随机的。
Ternary eutectics develop a rich variety of microstructures depending on the solidification conditions. This article describes a new procedure to analyze the three-phase arrangement in metallographic sections following solidification; this method provides a clear definition of both the interphase spacing and the degree of ordering. Distance and angle between the phase areas are calculated after determination of the centers of mass for each phase area. A polar plot of these data allows an easy determination of the spacing and the order. The new method is discussed with both experimental as well as simulated microstructure images. It is first tested on artificial phase arrangements, which are fully ordered, semi-ordered, or random.
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发表时间: 1999-07-01
期刊: MATERIALS TRANSACTIONS JIM
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