Use of Positron Annihilation Spectroscopy for Stress-Strain Measurements

Authors

Ajit K. Roy, University of Nevada, Las VegasFollow

Document Type

Annual Report

Publication Date

2007

Publisher

University of Nevada, Las Vegas

Publisher Location

Las Vegas (Nev.)

First page number:

32

Last page number:

33

Abstract

During the past academic year, this project was focused on the characterization of residual stress in welded specimens consisting of austenitic and martensitic stainless steels using an activation technique based on the Positron Annihilation Spectroscopic (PAS) method. The extent of residual stress was expressed in terms of three line-shape parameters (S-, W- and T-). Further, efforts were made to characterize linear lattice defects such as dislocations in the vicinity of Fusion-Line (FL), Heat-Affected- Zone (HAZ), and the base material of the welded specimens using Transmission Electron Microscopy (TEM). The metallurgical microstructures at these three regions have also been evaluated by optical microscopy.

Keywords

Austenitic stainless steel; Deformations (Mechanics); Martensitic stainless steel; Nuclear reactors — Materials — Testing; Plasticity; Strains and stresses; Welded joints — Fatigue

Controlled Subject

Austenitic stainless steel; Martensitic stainless steel; Nuclear reactors--Materials--Testing

Disciplines

Materials Science and Engineering | Metallurgy | Nuclear Engineering | Oil, Gas, and Energy

File Format

pdf

File Size

480 KB

Language

English

Rights

IN COPYRIGHT. For more information about this rights statement, please visit http://rightsstatements.org/vocab/InC/1.0/

Repository Citation

Roy, A. K. (2007). Use of Positron Annihilation Spectroscopy for Stress-Strain Measurements. 32-33.
Available at: https://digitalscholarship.unlv.edu/hrc_trp_sciences_materials/118