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。
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 α grains 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 fineαgrains.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.
作者
张俊祺
张明玉
陈文浩
赵小龙
王田
周雪红
ZHANG Junqi;ZHANG Mingyu;CHEN Wenhao;ZHAO Xiaolong;WANG Tian;ZHOU Xuehong(Xinjiang Xiangrun New Materials Technology Co.,Ltd.,Hami 839000,China)
出处
《湖南有色金属》
CAS
2024年第4期57-60,共4页
Hunan Nonferrous Metals
基金
自治区重点研发计划项目(2022B01029)。
关键词
TA15钛合金
微观组织
拉伸性能
断口形貌
TA15 titanium alloy
microstructure
tensile properties
fracture morphology
