文章信息/Info

Title:

Service Performance of Titanium Alloy in Marine Environment

文章編號:

1674-3962(2020)03-0185-05

作者:

董月成1; 2; 方志剛2; 常輝1; 淡振華1; 孫洋洋1; 李兆峰3

(1. 南京工業(yè)大學材料科學與工程學院，江蘇 南京 211816) (2. 中國人民解放軍92228部隊，北京 100072) （3. 中國船舶重工集團第七二五研究所，河南 洛陽 471000）

Author(s):

DONG Yuecheng1; 2;  FANG Zhigang2;  CHANG Hui1;  DAN Zhenhua1;  SUN Yangyang1;  LI Zhaofeng3

(1. College of Materials Science and Engineering, Nanjing Tech University, Nanjing 211816, China) (2. Unit 92228 of the Chinese People�餾 Liberation Army, Beijing 100072, China) (3. Luoyang Ship Material Research Institute, Luoyang 471000, China)

關鍵詞:

海洋裝備; 鈦合金; 組織; 壓縮蠕變; 低周疲勞; 應力腐蝕

Keywords:

titanium alloy;  compressure creep;  low cycle fatigue;  stress corrosion

分類號:

TG146.23

DOI:

10.7502/j.issn.1674-3962.201909015

文獻標志碼:

A

摘要:

隨著我國海洋裝備對高性能材料的需求越來越緊迫，具有高比強度和優(yōu)異耐腐蝕性能的鈦合金受到越來越多的重視。然而，由于缺乏海洋環(huán)境下鈦合金的相關服役性能數(shù)據(jù)，導致裝備設計單位和應用單位選材困難，極大限制了鈦合金在我國海洋工程裝備上的應用。針對鈦合金在海洋環(huán)境下服役面臨的主要失效形式：壓縮蠕變、低周疲勞和應力腐蝕，研究了不同組織形貌對TC4 ELI鈦合金相關服役性能的影響，研究結果表明：TC4 ELI鈦合金網(wǎng)籃組織的壓縮蠕變性能優(yōu)于雙態(tài)組織；雙態(tài)組織的低周疲勞性能優(yōu)于魏氏組織；魏氏組織的抗應力腐蝕性能優(yōu)于雙態(tài)組織�？梢�，組織形貌對鈦合金的服役性能具有重要影響，應根據(jù)具體的服役工況進行選取。

Abstract:

Titanium alloys, which possess high specific strength and excellent corrosion resistance, have received more and more attention， due to urgent demands of marine equipments for high-performance materials. However, application of titanium alloys is limited in our marine equipments due to absence of service performance data, our equipment design and application units are hesitated to choose materials type. In the present study, compressure creep, low cycle fatigue and stress corrosion property of TC4 ELI alloy with different microstructures were investigated. Results indicated that the basketweave microstructure possesses better compression creep behavior in comparison with duplex microstructure, the duplex microstructure possesses better low cycle fatigue property in comparison with Widmanstatten microstructure, and the Widmanstatten microstructure possesses better stress corrosion property in comparison with duplex microstructure. It can be seen that the microstructure has important effects on the service performance of titanium alloys, it should be selected according to the specific service conditions.