Application of the surface and volumetric positron techniques for the assessment of material damage in operational conditions

Autor: Alan W. Hunt, Scott Ritchie, Jagoda Urban-Klaehn
Rok vydání: 2007
Předmět:
Zdroj: physica status solidi c. 4:3595-3598
ISSN: 1610-1642
1862-6351
Popis: Positron Systems, Inc. applies surface and volumetric positron techniques to investigate damage in metal components in operational conditions. The width and shape of Doppler Broadening gamma peak (S-parameter) is used for defect analysis. Two techniques are commonly used: the Induced Positron Analysis - Surface technique (IPA-S) to investigate a surface and near-surface effects and the Induced Positron Analysis- Volumetric technique (IPA-V) that penetrates through the volume of the examined materials. Positron Annihilation measurements have been successfully performed in many applications. Presented below are cases demonstrating successful applications in assessing damage in gas generator fuel injector stems, aerospace parts that underwent strain and fatigue treatment, and residual stress effects in shot-peened specimens and steel plates with cracks. (© 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
Databáze: OpenAIRE
Externí odkaz: