使用小压头测试进行材料性能表征的进展

English | 2024 | ISBN: 9781003310372 | 195 pages | True PDF,EPUB | 66.97 MB

The small punch test (SPT) is useful to calculate changes in the tensile and fracture properties of structural materials during the service life of the materials of plant components. This book compiles advances in the development of correlations to calculate mechanical properties of the materials using SPT data. New correlations have been developed using hybrid methodology involving analytical and experimental data. The newly developed correlations have been tested conducting case studies on SPT and pre- cracked/ notched SPT (p- SPT) specimens. The eventual applications of all the new correlations have been demonstrated by conducting a real- life case study involving degradation of structural material from ductile to semi- brittle state due to aging.

Features

• Presents exclusive material on the remnant life assessment of in- service materials using SPTs.

• Assesses the fracture toughness of ductile materials using the experimentally measured biaxial fracture strain.

• Provides new equations to calculate the yield and ultimate stresses of copper and titanium alloys using measured SPT data.

• Explores functions to correlate the load- displacement data of p- SPT specimens with fracture properties.

• Includes case studies with direct relevance to the degradation of plant materials.

This book is aimed at researchers, professionals, and graduate students in materials science and engineering, mechanical property characterization and testing, and small- scale experimentation. It is expected that the advanced methodology presented in this book to evaluate changes in the properties of aged materials during the service life using SPT data are useful to designers for safety evaluation and also to calculate the remaining service life of industrial components for life extension studies.

The small punch test (SPT) 是一种有用的测试方法，用于计算在材料的使用寿命内结构材料的拉伸和断裂性能的变化。本书汇集了利用SPT数据来计算材料机械性能发展的最新研究成果。通过结合分析和实验数据开发出新的相关性，并对使用SPT数据的新开发的相关性进行了验证，这些验证是在预裂/有缺口的小型敲击试验（p-SPT）的样本上进行的。所有新开发的相关性的实际应用被展示在一个涉及由于老化导致结构材料从塑性到半脆性状态降级的真实案例研究中。

特点

• 提供有关使用SPT评估在用材料剩余寿命的独家材料。

• 使用实验测量的双轴断裂应变来评估塑性材料的断裂韧性。

• 为铜和钛合金提供了新的方程来计算基于测量的SPT数据的屈服应力和极限应力。

• 探索将p-SPT样本的载荷-位移数据与断裂特性相关联的功能。

• 包括直接关联到材料降级的案例研究。

这本书旨在为材料科学与工程、机械性能表征和测试以及小型实验领域的研究人员、专业人士和研究生服务。预计本书中展示的评估老化材料在使用寿命内性质变化的方法论对设计师进行安全评估是有用的，同时也可用于计算工业组件以延长寿命的研究中的剩余使用期限。

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