不同规格TA15钛合金板材微观组织与拉伸性能的研究
Study on Microstructure and Tensile Properties of TA15 Titanium Alloy Sheets with Different Specifications
张俊祺 1张明玉 1陈文浩 1赵小龙 1王田 1周雪红1
作者信息
- 1. 新疆湘润新材料科技有限公司,新疆 哈密 839000
- 折叠
摘要
通过包覆叠轧工艺,对TA15 钛合金进行轧制加工,研究不同规格TA15 钛合金板材的微观组织以及拉伸性能.研究发现:不同规格板材RD和TD方向的微观组织中,均有大量的细小α晶粒在组织中均匀分布,相比与TD方向的微观组织,板材RD方向的微观组织中除细小α晶粒,还存在一定的带状组织.两种不同规格的板材中,发现厚度较薄板材的强度较高,进一步对比,发现两种规格板材RD方向强度相对较低.不同规格板材的拉伸断口形貌整体上显示出相似的特征,均是以韧窝为主,且部分小韧窝分布在尺寸较大的韧窝内部.除了典型的韧窝特征外,发现TD方向的拉伸断口中,还存在撕裂棱以及微裂纹.
Abstract
TA15 titanium alloy was rolled by roll-bonding process,and the microstructure and tensile properties of TA15 titanium alloy sheets with different specifications were studied.It was found that a large number of fine αgrains were evenly distributed in the microstructure in the RD and TD directions of different specifications.Compared with the microstructure in the TD direction,there was a certain banded structure in the microstructure in the RD direction of the sheet except for the fine αgrains.In the two different specifications of the plate,it is found that the strength of the thinner plate is higher.Further comparison,it is found that the RD direction strength of the two specifications of the plate is relatively low.The tensile fracture morphology of plates with different specifications shows similar characteristics as a whole,which are mainly dimples,and some small dimples are distributed inside the larger dimples.In addition to the typical dimple characteristics,it is found that there are tearing edges and microcracks in the fracture of TD direction.
关键词
TA15钛合金/微观组织/拉伸性能/断口形貌Key words
TA15 titanium alloy/microstructure/tensile properties/fracture morphology引用本文复制引用
基金项目
自治区重点研发计划项目(2022B01029)
出版年
2024
NETL
NSTL
万方数据