contributor author | K. S. Chan | |
contributor author | ASME Fellow | |
contributor author | R. John | |
contributor author | S. J. Hudak | |
contributor author | J. Feiger | |
contributor author | Y.-D. Lee | |
date accessioned | 2017-05-09T00:16:19Z | |
date available | 2017-05-09T00:16:19Z | |
date copyright | January, 2005 | |
date issued | 2005 | |
identifier issn | 0094-4289 | |
identifier other | JEMTA8-27065#2_1.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl/handle/yetl/131903 | |
description abstract | The fatigue crack growth (FCG) behavior of PWA1484 single crystals was characterized in air under mixed-mode loading at 593°C as a function of crystallographic orientation using an asymmetric four-point bend test technique. Most mixed-mode fatigue cracks deflected from the symmetry plane and propagated as transprecipitate, noncrystallographic cracks, while self-similar fatigue crack growth occurred on the (111) planes in (111)/[011] and (111)/[112̄] oriented crystals. The local stress intensity factors and the crack paths of the deflected mixed-mode cracks were analyzed using the finite-element fracture mechanics code, FRANC2D/L. The results indicated that the deflected crack path was close to being normal to the maximum tensile stress direction where the Mode II component diminishes. Crystallographic analysis of the deflected crack paths revealed that the Mode I and the deflected mixed-mode cracks were usually of different crystallographic orientations and could exhibit different Mode I FCG thresholds when the crystallography of the crack paths differed substantially. These results were used to identify the driving force and conditions for cracking mode transition. | |
publisher | The American Society of Mechanical Engineers (ASME) | |
title | Fatigue Crack Growth Thresholds of Deflected Mixed-Mode Cracks in PWA1484 | |
type | Journal Paper | |
journal volume | 127 | |
journal issue | 1 | |
journal title | Journal of Engineering Materials and Technology | |
identifier doi | 10.1115/1.1836765 | |
journal fristpage | 2 | |
journal lastpage | 7 | |
identifier eissn | 1528-8889 | |
keywords | Fracture (Materials) | |
keywords | Fracture (Process) | |
keywords | Fatigue cracks | |
keywords | Deflection | |
keywords | Stress | |
keywords | Force | |
keywords | Crystals AND Anisotropy | |
tree | Journal of Engineering Materials and Technology:;2005:;volume( 127 ):;issue: 001 | |
contenttype | Fulltext | |