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Evaluating Alloy Composition Using The Gibbs Triangle

机译:使用吉布斯三角形评估合金成分

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Ingot quality is characterized by SPC evaluations; meaning Structure (S), Property (P), and Composition (C). Structure-property studies are classified as "sensitive" attributes while composition is considered to be an "insensitive" parameter. For example, it is common to hear the phrase that global composition is "insensitive" to structure and property values. For superalloys, structural analyses are applied using the scanning electron microscope (SEM) to determine both size, shape and distribution effects for the gamma prime phase. Examination of properties requires mechanical tests for strength, hardness, toughness and, so forth. However, for investigations on composition, the scientific community still depends on optical emission spectroscopy (OES) for measurements of global results using arc burns to represent bulk volume. This leads to the obvious question.... What needs to be done to better quantify the OES results? Further.... How can the controlling microconstituents of a superalloy be better related to the overall composition results for an improved qualification of ingots? This article addresses these needs and priorities. And, the said article is offered as a contribution to the sum of total knowledge.
机译:通过SPC评估来表征铸锭质量;表示结构(S),属性(P)和组成(C)。结构属性研究被归类为“敏感”属性,而组成被视为“不敏感”参数。例如,通常会听到这样的短语:全局组成对结构和属性值“不敏感”。对于超级合金,使用扫描电子显微镜(SEM)进行结构分析,以确定γ初生相的尺寸,形状和分布效果。性能检查需要对强度,硬度,韧性等进行机械测试。但是,对于成分的研究,科学界仍然依靠光发射光谱法(OES)来测量整体结果,并使用电弧燃烧来代表体积。这引出了一个明显的问题。...需要做些什么才能更好地量化OES结果?进一步....为了提高铸锭质量,超级合金的控制微成分如何更好地与整体成分结果相关?本文解决了这些需求和优先事项。并且,所述文章被提供作为对全部知识的总和的贡献。

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