Commercial pure titanium (CP-Ti) is an attractive material, due to its good properties such as high strength, high specific work hardening ability, excellent plasticity, toughness, corrosion resistance and weld ability. It is commonly used in pressure vessels, such as heat exchangers, pumps, valves and so on. It has been reported that the room temperature creep has a great influence on the failure of titanium pressure vessel. In this paper, in order to investigate room temperature creep behavior and its effect on tensile properties of CP-Ti, both creep and tensile experiments were carried out. According to creep experiment results, CP-Ti shows strong stress dependent creep behavior at the creep stress higher than 305MPa. On the contrary, the strong loading rate dependent creep behavior occurs at the creep stress lower than 305MPa. Besides, creep strain of CP-Ti can be reduced by pretension. As pretension reaches 6%, creep behavior of CP-Ti is completely suppressed at the creep stress of 320MPa. Subsequent tensile test results show that the occurrence of room temperature creep obviously enhances the strength of CP-Ti. With the increase of creep strain and loading rate in previous creep tests, the yield strength and tensile strength of CP-Ti increase.
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ASME 2017 Pressure Vessels and Piping Conference
July 16–20, 2017
Waikoloa, Hawaii, USA
Conference Sponsors:
- Pressure Vessels and Piping Division
ISBN:
978-0-7918-5799-1
PROCEEDINGS PAPER
Room Temperature Creep Behavior and its Effect on Tensile Properties of CP-Ti
Le Chang,
Le Chang
Nanjing Tech University, Nanjing, China
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Changyu Zhou,
Changyu Zhou
Nanjing Tech University, Nanjing, China
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Xiaohua He
Xiaohua He
Nanjing Tech University, Nanjing, China
Search for other works by this author on:
Le Chang
Nanjing Tech University, Nanjing, China
Changyu Zhou
Nanjing Tech University, Nanjing, China
Xiaohua He
Nanjing Tech University, Nanjing, China
Paper No:
PVP2017-65129, V06AT06A043; 8 pages
Published Online:
October 26, 2017
Citation
Chang, L, Zhou, C, & He, X. "Room Temperature Creep Behavior and its Effect on Tensile Properties of CP-Ti." Proceedings of the ASME 2017 Pressure Vessels and Piping Conference. Volume 6A: Materials and Fabrication. Waikoloa, Hawaii, USA. July 16–20, 2017. V06AT06A043. ASME. https://doi.org/10.1115/PVP2017-65129
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