中国科学院力学研究所机构知识库
Advanced  
IMECH-IR  > 非线性力学国家重点实验室  > 期刊论文
Title:
Nanograin layer formation at crack initiation region for very-high-cycle fatigue of a Ti-6Al-4V alloy
Author: Su, H.; Liu, X.; Sun CQ(孙成奇); Hong YS(洪友士)
Source: FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
Issued Date: 2017-06-01
Volume: 40, Issue:6, Pages:979-993
Abstract: The microstructural features and the fatigue propensities of interior crack initiation region for very-high-cycle fatigue (VHCF) of a Ti-6Al-4V alloy were investigated in this paper. Fatigue tests under different stress ratios of R=-1, -0.5, -0.1, 0.1 and 0.5 were conducted by ultrasonic axial cycling. The observations by SEM showed that the crack initiation of VHCF presents a fish-eye (FiE) morphology containing a rough area (RA), and the FiE and RA are regarded as the characteristic regions for crack initiation of VHCF. Further examinations by TEM revealed that a layer of nanograins exists in the RA for the case of R=-1, while nanograins do not appear in the FiE outside RA for the case of R=-1, and in the RA for the case of R=0.5, which is explained by the Numerous Cyclic Pressing model. In addition, the estimations of the fatigue propensities for interior crack initiation stage of VHCF indicated that the fatigue life consumed by RA takes a dominant part of the total fatigue life and the related crack propagation rate is rather slow.
Keyword: crack initiation ; fatigue life ; nanograins ; Ti-6Al-4V alloy ; very-high-cycle fatigue
Language: 英语
Indexed Type: SCI ; EI
Corresponding Author: Hong, Y (reprint author), Chinese Acad Sci, Inst Mech, LNM, Beijing, Peoples R China. ; Hong, Y (reprint author), Univ Chinese Acad Sci, Beijing, Peoples R China.
Correspondent Email: hongys@imech.ac.cn
DOI: 10.1111/ffe.12562
DOC Type: Article
WOS Subject: Engineering, Mechanical ; Materials Science, Multidisciplinary
WOS Subject Extended: Engineering ; Materials Science
WOS Keyword Plus: HIGH-STRENGTH STEELS ; STRESS RATIO ; BEARING STEEL ; N-GREATER-THAN-10(7) CYCLES ; METALLIC MATERIALS ; BEHAVIOR ; LIFE ; MECHANISM ; PROPAGATION ; FAILURE
WOS ID: WOS:000400608100011
ISSN: 8756-758X
Funder: National Natural Science Foundation of China(11572325 ; 11202210)
Department: LNM金属材料微结构与力学性能
Classification: 二类/Q1
Ranking: 1
Citation statistics:
Content Type: 期刊论文
URI: http://dspace.imech.ac.cn/handle/311007/60907
Appears in Collections:非线性力学国家重点实验室_期刊论文

Files in This Item: Download All
File Name/ File Size Content Type Version Access License
JouArt-2017-101.pdf(1106KB)期刊论文作者接受稿开放获取View Download

Recommended Citation:
Su, H.,Liu, X.,Sun CQ,et al. Nanograin layer formation at crack initiation region for very-high-cycle fatigue of a Ti-6Al-4V alloy[J]. FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES,2017-06-01,40(6):979-993.
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Su, H.]'s Articles
[Liu, X.]'s Articles
[孙成奇]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Su, H.]‘s Articles
[Liu, X.]‘s Articles
[孙成奇]‘s Articles
Related Copyright Policies
Null
Social Bookmarking
Add to CiteULike Add to Connotea Add to Del.icio.us Add to Digg Add to Reddit
文件名: JouArt-2017-101.pdf
格式: Adobe PDF
所有评论 (0)
暂无评论
 
评注功能仅针对注册用户开放,请您登录
您对该条目有什么异议,请填写以下表单,管理员会尽快联系您。
内 容:
Email:  *
单位:
验证码:   刷新
您在IR的使用过程中有什么好的想法或者建议可以反馈给我们。
标 题:
 *
内 容:
Email:  *
验证码:   刷新

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.

 

 

Valid XHTML 1.0!
Copyright © 2007-2018  中国科学院力学研究所 - Feedback
Powered by CSpace