Nondestructive Measurement of key Mechanical Properties in Welded Components Using a Novel Stress-Strain Microprobe System

摘要

Determination of key mechanical properties of welded components is essential for structural integrity evaluation and for life assessment of weld repairs. A novel protable/in-situ. Stress-Strain Microprobe (SSM) system was used to measure true-stress/true-plastic-strain behavior of several metallic materials, welds, and their heat-affected-zones (HAZs) in various metallurgical and damage conditions. The SSM system utilized an automated ball indentation (ABI) technique to measure mechaincal properties in carbon steels, stainless steels, nickel alloys, aluminum alloys, zirconium, electronic soldering materials, etc. ABI leaves a small impression, is essentially a nondestructive technique, and can be used in-situ.