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ASTM E562-2008 用系统的人工逐点计数法测定体积因数的标准试验方法

ASTM E562-2008 用系统的人工逐点计数法测定体积因数的标准试验方法

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资料描述

【英文标准名称】: Standard Test Method for Determining Volume Fraction by Systematic Manual Point Count
【原文标准名称】: 用系统的人工逐点计数法测定体积因数的标准试验方法
【标准号】: ASTM E562-2008
【标准状态】: 现行
【国别】: 美国
【发布日期】: 2008
【实施或试行日期】:
【发布单位】: 美国材料与试验协会(US-ASTM)
【起草单位】: E04.14
【标准类型】: (Test Method)
【标准水平】: ()
【中文主题词】:
【英文主题词】: Metallographic analysis/inspection; Point count; Systematic manual point count; Volume change
【摘要】: This test method is based upon the stereological principle that a grid with a number of regularly arrayed points, when systematically placed over an image of a two-dimensional section through the microstructure, can provide, after a representative number of placements on different fields, an unbiased statistical estimation of the volume fraction of an identifiable constituent or phase (1, 2, 3). This test method has been described (4) as being superior to other manual methods with regard to effort, bias, and simplicity. Any number of clearly distinguishable constituents or phases within a microstructure (or macrostructure) can be counted using the method. Thus, the method can be applied to any type of solid material from which adequate two-dimensional sections can be prepared and observed. A condensed step-by-step guide for using the method is given in Annex A1. 1.1 This test method describes a systematic manual point counting procedure for statistically estimating the volume fraction of an identifiable constituent or phase from sections through the microstructure by means of a point grid. 1.2 The use of automatic image analysis to determine the volume fraction of constituents is described in Practice E 1245. 1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
【中国标准分类号】: H10
【国际标准分类号】: 77_040_99
【页数】: 7P.;A4
【正文语种】: 英语

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