EFFECT OF SURFACE ROUGHNESS ON FATIGUE PROPERTY OF TC4 TITANIUM ALLOY BY SELECTIVE LASER MELTING

DONG DengKe; CHEN An; LI XiaoFei; ZHANG HaiYing

doi:10.16579/j.issn.1001.9669.2020.05.012

您当前的位置：

首页 >

文章列表页 >

EFFECT OF SURFACE ROUGHNESS ON FATIGUE PROPERTY OF TC4 TITANIUM ALLOY BY SELECTIVE LASER MELTING

更新时间：2022-09-22

- EFFECT OF SURFACE ROUGHNESS ON FATIGUE PROPERTY OF TC4 TITANIUM ALLOY BY SELECTIVE LASER MELTING
- Journal of Mechanical Strength Vol. 42, Issue 5, Pages: 1094-1098(2020)
- 作者机构：
  
  1. 中国飞机强度研究所
  2. 中国航空研究院
- 作者简介：
- 基金信息：
- DOI：10.16579/j.issn.1001.9669.2020.05.012
  CLC：
扫描看全文
DONG DengKe, CHEN An, LI XiaoFei, et al. EFFECT OF SURFACE ROUGHNESS ON FATIGUE PROPERTY OF TC4 TITANIUM ALLOY BY SELECTIVE LASER MELTING. [J]. 42(5):1094-1098(2020)
DOI：

DONG DengKe, CHEN An, LI XiaoFei, et al. EFFECT OF SURFACE ROUGHNESS ON FATIGUE PROPERTY OF TC4 TITANIUM ALLOY BY SELECTIVE LASER MELTING. [J]. 42(5):1094-1098(2020) DOI： 10.16579/j.issn.1001.9669.2020.05.012.

摘要

针对沉积表面和机加表面激光选区熔化(SLM)成形TC4钛合金试验件,通过疲劳试验得到两种表面粗糙度下的细节疲劳额定值(DFR),同时借助扫描电镜研究表面粗糙度对SLM成形TC4疲劳性能的影响。结果表明:沉积表面的DFR值为235.1 MPa,机加表面的DFR值为283.3 MPa,后者疲劳性能优于前者。断口分析显示表面粗糙度对疲劳裂纹萌生方式影响显著,沉积表面疲劳裂纹源萌生于试验件的表面,断口粗糙,高低起伏比较明显,机加表面疲劳裂纹源起始于试验件内部,断口比较平坦。

Abstract

The fatigue characteristic of TC4 titanium alloy by selective laser melting（ SLM） with two different surface roughness is investigated. The detail fatigue rating（ DFR） values are achieved based on the fatigue tests. The fatigue fractography is observed by scanning electron microscope to find the reason for surface roughness modification. The results indicate that DFR value of as-built surface specimen is 235. 1 MPa and machined surface specimen is 283. 3 MPa. So the SLM TC4 specimen in machined surface has superior fatigue property. The surface roughness has a significant effect on the crack initiation site. The fatigue crack in as-built specimen initiates from surface. Fatigue crack in machined specimen initiates from inside to subsurface.The latter is flat and the former is relatively rough.

关键词

激光选区熔化表面粗糙度细节疲劳额定值疲劳断口

Keywords

Selective laser meltingSurface roughnessDetail Fatigue Rating（DFR）Fatigue fractography

references

Views

486

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

EFFECTS OF POST PROCESSES ON THE MECHANICAL PROPERTIES OF TI-6AL-4V TITANIUM ALLOY BY SELECTIVE LASER MELTING

STUDY ON THE EFFECT OF ROLLING STRENGTHENING ON THE SURFACE INTEGRITY OF 45 STEEL THREAD ROOT

STUDIED ON AN IMPROVED CONSTITUTIVE MODEL AND SIMULATION FOR MILLING MEDICAL Ti-xNb-2Fe ALLOY

DETERMINATION OF MACHINING PARAMETERS OF COLD ROLL-BEATING SPLINE SURFACE ROUGHNESS

EFFECT OF COLD ROLL-BEATING SPLINE FORMING PARAMETERS ON SURFACE ROUGHNESS

Related Author

No data

Related Institution

Avic Aircraft Strength Research Institute

School of Mechanical and Power Engineering,Zhengzhou University

Henan Province Industrial Technology Research Institute of Resources and Materials,Zhengzhou University

College of Mechanical Engineering, University of Shanghai for Science and Technology

School of Mechatronics Engineering,Henan University of Science and Technology

⁰