Impact of out‐of‐plane constraint on creep crack growth behavior of M174+ aluminum alloys by nano‐computed tomography (CT)
-
Published:2023-11-20
Issue:2
Volume:47
Page:358-371
-
ISSN:8756-758X
-
Container-title:Fatigue & Fracture of Engineering Materials & Structures
-
language:en
-
Short-container-title:Fatigue Fract Eng Mat Struct
Author:
Guo Zhimin12,
Guo Qi2,
Chen Dahui2,
Huang Kuidong1,
Qi Zicheng2
Affiliation:
1. Key Laboratory of High Performance Manufacturing for Aero Engine Northwestern Polytechnical University Xi'an China
2. Inner Mongolia Metallic Materials Research Institute Ningbo China
Abstract
AbstractNano‐computed tomography (nano‐CT) was utilized to assess the three‐dimensional information on inner damage and reveal the impact and mechanism of out‐of‐plane constraint on creep crack growth (CCG). Experimental findings revealed that stress levels (C* value) altered the impact and mechanism of out‐of‐plane constraint levels on CCG rates. In the lower C* region related to actual serving conditions, the increase in the level of out‐of‐plane constraint accelerated the CCG rates, which could be attributed to a change in the creep fracture mode from creep ductile fracture to creep brittle fracture. Elevated stress levels enlarge the creep deformation and plastic deformation as well as promote the coalescence of holes and propagation of creep cracks, thereby increasing the CCG rates.
Funder
National Key Research and Development Program of China
Science and Technology Innovation 2025 Major Project of Ningbo
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science