Investigation of Slow Eutectoid Element on Tensile Properties and Superplasticity of a Forged SP700 Titanium Alloy

The tensile properties and superplasticity of a forged SP700 alloy with slow eutectoid element (1.5%Cr) addition were investigated in the present paper. The results of the microstructures showed that slow eutectoid element Cr has a significant influence on stabilizing the β phase and the SP700Cr all...

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Autores principales:	Dong Han, Yongqing Zhao, Weidong Zeng, Junfeng Xiang
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	SP700 alloy slow eutectoid element microstructure tensile properties superplasticity Mining engineering. Metallurgy TN1-997
Acceso en línea:	https://doaj.org/article/4927f5e67aa34569a8da6fdd5dcd29e8
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spelling	oai:doaj.org-article:4927f5e67aa34569a8da6fdd5dcd29e82021-11-25T18:22:25ZInvestigation of Slow Eutectoid Element on Tensile Properties and Superplasticity of a Forged SP700 Titanium Alloy10.3390/met111118522075-4701https://doaj.org/article/4927f5e67aa34569a8da6fdd5dcd29e82021-11-01T00:00:00Zhttps://www.mdpi.com/2075-4701/11/11/1852https://doaj.org/toc/2075-4701The tensile properties and superplasticity of a forged SP700 alloy with slow eutectoid element (1.5%Cr) addition were investigated in the present paper. The results of the microstructures showed that slow eutectoid element Cr has a significant influence on stabilizing the β phase and the SP700Cr alloy showed a uniform duplex and completely globular microstructure after annealing at 820 °C for 1 h and aging at 500 °C for 6 h. The results of the tensile tests showed that the yield strength, ultimate tensile strength and elongation of the alloy with optimized microstructure were 1312 MPa, 1211 MPa and 10% at room temperature, and the elongation was achieved to 1127% at 770 °C. Compared with that of the SP700 alloy, the strain rate sensitivity of the SP700Cr alloy showed a higher value. The microstructures after elevated temperature tensile tests showed that the higher density of dislocations and twins exists in SP700 alloy and the lower density of dislocations favor distribution in SP700Cr alloy. Based on the above results, the tensile properties and superplasticity of the forged SP700 alloy with 1.5% Cr addition was analyzed. In addition, microstructure characteristics were investigated by the TEM and EBSD technologies.Dong HanYongqing ZhaoWeidong ZengJunfeng XiangMDPI AGarticleSP700 alloyslow eutectoid elementmicrostructuretensile propertiessuperplasticityMining engineering. MetallurgyTN1-997ENMetals, Vol 11, Iss 1852, p 1852 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	SP700 alloy slow eutectoid element microstructure tensile properties superplasticity Mining engineering. Metallurgy TN1-997
spellingShingle	SP700 alloy slow eutectoid element microstructure tensile properties superplasticity Mining engineering. Metallurgy TN1-997 Dong Han Yongqing Zhao Weidong Zeng Junfeng Xiang Investigation of Slow Eutectoid Element on Tensile Properties and Superplasticity of a Forged SP700 Titanium Alloy
description	The tensile properties and superplasticity of a forged SP700 alloy with slow eutectoid element (1.5%Cr) addition were investigated in the present paper. The results of the microstructures showed that slow eutectoid element Cr has a significant influence on stabilizing the β phase and the SP700Cr alloy showed a uniform duplex and completely globular microstructure after annealing at 820 °C for 1 h and aging at 500 °C for 6 h. The results of the tensile tests showed that the yield strength, ultimate tensile strength and elongation of the alloy with optimized microstructure were 1312 MPa, 1211 MPa and 10% at room temperature, and the elongation was achieved to 1127% at 770 °C. Compared with that of the SP700 alloy, the strain rate sensitivity of the SP700Cr alloy showed a higher value. The microstructures after elevated temperature tensile tests showed that the higher density of dislocations and twins exists in SP700 alloy and the lower density of dislocations favor distribution in SP700Cr alloy. Based on the above results, the tensile properties and superplasticity of the forged SP700 alloy with 1.5% Cr addition was analyzed. In addition, microstructure characteristics were investigated by the TEM and EBSD technologies.
format	article
author	Dong Han Yongqing Zhao Weidong Zeng Junfeng Xiang
author_facet	Dong Han Yongqing Zhao Weidong Zeng Junfeng Xiang
author_sort	Dong Han
title	Investigation of Slow Eutectoid Element on Tensile Properties and Superplasticity of a Forged SP700 Titanium Alloy
title_short	Investigation of Slow Eutectoid Element on Tensile Properties and Superplasticity of a Forged SP700 Titanium Alloy
title_full	Investigation of Slow Eutectoid Element on Tensile Properties and Superplasticity of a Forged SP700 Titanium Alloy
title_fullStr	Investigation of Slow Eutectoid Element on Tensile Properties and Superplasticity of a Forged SP700 Titanium Alloy
title_full_unstemmed	Investigation of Slow Eutectoid Element on Tensile Properties and Superplasticity of a Forged SP700 Titanium Alloy
title_sort	investigation of slow eutectoid element on tensile properties and superplasticity of a forged sp700 titanium alloy
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/4927f5e67aa34569a8da6fdd5dcd29e8
work_keys_str_mv	AT donghan investigationofsloweutectoidelementontensilepropertiesandsuperplasticityofaforgedsp700titaniumalloy AT yongqingzhao investigationofsloweutectoidelementontensilepropertiesandsuperplasticityofaforgedsp700titaniumalloy AT weidongzeng investigationofsloweutectoidelementontensilepropertiesandsuperplasticityofaforgedsp700titaniumalloy AT junfengxiang investigationofsloweutectoidelementontensilepropertiesandsuperplasticityofaforgedsp700titaniumalloy
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Investigation of Slow Eutectoid Element on Tensile Properties and Superplasticity of a Forged SP700 Titanium Alloy

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