P-S-N Curve Description of Laser Metal Deposition Ti-6.5Al-2Zr-1Mo-1V Titanium Alloy after Duplex Annealing

Fatigue tests were conducted on standard smooth laser metal deposition (LMD) Ti-6.5Al-2Zr-1Mo-1V titanium alloy specimens under three constant-amplitude stresses. The mixed failure behaviors and the influence of internal pores on the fatigue life were discussed in detail. The double-peak characteris...

Descripción completa

Detalles Bibliográficos
Autores principales: Wang, Tianshuai, He, Xiaofan, Wang, Xiaobo, Li, Yuhai
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6384759/
https://www.ncbi.nlm.nih.gov/pubmed/30704044
http://dx.doi.org/10.3390/ma12030418
_version_ 1783397052952084480
author Wang, Tianshuai
He, Xiaofan
Wang, Xiaobo
Li, Yuhai
author_facet Wang, Tianshuai
He, Xiaofan
Wang, Xiaobo
Li, Yuhai
author_sort Wang, Tianshuai
collection PubMed
description Fatigue tests were conducted on standard smooth laser metal deposition (LMD) Ti-6.5Al-2Zr-1Mo-1V titanium alloy specimens under three constant-amplitude stresses. The mixed failure behaviors and the influence of internal pores on the fatigue life were discussed in detail. The double-peak characteristics of the fatigue life distribution have been observed, and a bimodal lognormal distribution (BLG) with five variables can be used to describe the fatigue life variation. A parameter estimation method based on the maximum likelihood estimation (MLE) method was proposed to estimate the BLG distribution parameters, and the Newton–Raphson algorithm was used to solve the nonlinear equations derived from the likelihood functions. A P-S-N curve description of LMD titanium alloy was established based on the BLG and verified by fatigue life data obtained from a fatigue test.
format Online
Article
Text
id pubmed-6384759
institution National Center for Biotechnology Information
language English
publishDate 2019
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-63847592019-02-23 P-S-N Curve Description of Laser Metal Deposition Ti-6.5Al-2Zr-1Mo-1V Titanium Alloy after Duplex Annealing Wang, Tianshuai He, Xiaofan Wang, Xiaobo Li, Yuhai Materials (Basel) Article Fatigue tests were conducted on standard smooth laser metal deposition (LMD) Ti-6.5Al-2Zr-1Mo-1V titanium alloy specimens under three constant-amplitude stresses. The mixed failure behaviors and the influence of internal pores on the fatigue life were discussed in detail. The double-peak characteristics of the fatigue life distribution have been observed, and a bimodal lognormal distribution (BLG) with five variables can be used to describe the fatigue life variation. A parameter estimation method based on the maximum likelihood estimation (MLE) method was proposed to estimate the BLG distribution parameters, and the Newton–Raphson algorithm was used to solve the nonlinear equations derived from the likelihood functions. A P-S-N curve description of LMD titanium alloy was established based on the BLG and verified by fatigue life data obtained from a fatigue test. MDPI 2019-01-30 /pmc/articles/PMC6384759/ /pubmed/30704044 http://dx.doi.org/10.3390/ma12030418 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Wang, Tianshuai
He, Xiaofan
Wang, Xiaobo
Li, Yuhai
P-S-N Curve Description of Laser Metal Deposition Ti-6.5Al-2Zr-1Mo-1V Titanium Alloy after Duplex Annealing
title P-S-N Curve Description of Laser Metal Deposition Ti-6.5Al-2Zr-1Mo-1V Titanium Alloy after Duplex Annealing
title_full P-S-N Curve Description of Laser Metal Deposition Ti-6.5Al-2Zr-1Mo-1V Titanium Alloy after Duplex Annealing
title_fullStr P-S-N Curve Description of Laser Metal Deposition Ti-6.5Al-2Zr-1Mo-1V Titanium Alloy after Duplex Annealing
title_full_unstemmed P-S-N Curve Description of Laser Metal Deposition Ti-6.5Al-2Zr-1Mo-1V Titanium Alloy after Duplex Annealing
title_short P-S-N Curve Description of Laser Metal Deposition Ti-6.5Al-2Zr-1Mo-1V Titanium Alloy after Duplex Annealing
title_sort p-s-n curve description of laser metal deposition ti-6.5al-2zr-1mo-1v titanium alloy after duplex annealing
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6384759/
https://www.ncbi.nlm.nih.gov/pubmed/30704044
http://dx.doi.org/10.3390/ma12030418
work_keys_str_mv AT wangtianshuai psncurvedescriptionoflasermetaldepositionti65al2zr1mo1vtitaniumalloyafterduplexannealing
AT hexiaofan psncurvedescriptionoflasermetaldepositionti65al2zr1mo1vtitaniumalloyafterduplexannealing
AT wangxiaobo psncurvedescriptionoflasermetaldepositionti65al2zr1mo1vtitaniumalloyafterduplexannealing
AT liyuhai psncurvedescriptionoflasermetaldepositionti65al2zr1mo1vtitaniumalloyafterduplexannealing

Ejemplares similares