文献类型：期刊文献

英文题名：Effect of annealing temperature on mechanical properties of TC21 titanium alloy with multilevel lamellar microstructure

作者：Wang, Jiangxiong Ye, Xianwei Li, Yuanhui Wan, Mingpan Huang, Chaowen Huang, Fang Lei, Min Liu, Dan Ma, Rui Ren, Xianli

第一作者：Wang, Jiangxiong

通信作者：Wan, MP[1]

机构：[1]Guizhou Univ, Coll Mat & Met, Guiyang 550025, Peoples R China;[2]Key Lab Mat Struct & Strength Guizhou Prov, Guiyang 550025, Peoples R China;[3]Natl Local Coconstruct Engn Lab High Performance M, Guiyang 550025, Peoples R China;[4]GuizhouAnda Aviat Forging Co Ltd, Anshun 561000, Peoples R China;[5]Guizhou Inst Technol, Guiyang 550003, Peoples R China

第一机构：Guizhou Univ, Coll Mat & Met, Guiyang 550025, Peoples R China

通信机构：corresponding author), Guizhou Univ, Coll Mat & Met, Guiyang 550025, Peoples R China.

年份：2023

卷号：869

外文期刊名：MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

收录：;EI(收录号：20230913632979);Scopus(收录号：2-s2.0-85148545275);WOS:【SCI-EXPANDED(收录号:WOS:000991319500001)】；

基金：This work was supported by the National Natural Science Foundation of China (Nos. 52061005 and 52001253) and the Science and Technology Program of Guizhou province (Nos. [2020] 1Y196, [2020] 2Y021 and [2021] 310) . We also appreciate the Program of Guizhou Institute of Technology (No. XJGC20190950) .

语种：英文

外文关键词：TC21 titanium alloy; Multilevel lamellar microstructure; Annealing temperature; Mechanical properties

摘要：The purpose of the present work is to reveal the effect of annealing temperature on the microstructure and mechanical properties of multilevel lamellar microstructure of TC21 titanium alloy in triple heat treatments, where the annealing temperatures are 760, 800 and 840 degrees C, respectively. The multilevel microstructure consists of beta grain, alpha colony (alpha c), alpha plates (alpha p) and aged alpha plates (alpha s). The strength, plasticity, impact toughness and fracture toughness of the material were tested. The microstructure was characterized by using optical microscopy (OM), scanning electron microscopy (SEM), laser scanning confocal microscope (LSCM) and electron backscatter diffraction (EBSD). Results show that the size of alpha c increases and the widths of alpha p and beta t increase gradually with the increase in annealing temperature. The number of alpha s precipitated on beta matrix increases sharply and their size becomes smaller after aging treatment. The strength of TC21 titanium alloy increases as increasing annealing temperature while plasticity decreases. The alpha s is a critical unit which plays an important role in controlling strength of the alloy through Hall-Petch fitting. Furthermore, increasing the size of alpha c and decreasing the size of alpha p and alpha s are beneficial to increase the strength of the alloy. The impact toughness and fracture toughness of the alloy increase firstly then decrease with the increase in annealing temperature. The synergistic effect originating from different level alpha phase determine the toughness of the alloy. Massive cleavage and intergranular fractures in the fracture contribute to the increased length of crack propagation path so as to the decrease of toughness of the alloy. Meanwhile, it is confirmed found the toughness is also related to the change of size of alpha c after annealing treatment. And too large or too small size of alpha c is not conducive to the improvement of the toughness of the alloy.