不同固溶时效工艺对TA10钛合金微观组织与拉伸性能的影响
Effects of different solution and aging processes on microstructure and tensile properties of TA10 titanium alloy
高芳兰 1张明玉 1杨娜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
通过实施不同固溶时效工艺对TA10钛合金进行实验研究,借助光学显微镜、扫描电子显微镜以及室温拉伸测试等多种分析手段,深入探究不同固溶时效工艺条件下TA10钛合金的微观组织变化及其拉伸性能.研究发现:固溶温度为两相区时,合金组织以初生α相及细小α'相为主,此时合金强度较低,塑性较高.时效处理后的组织中α'相消失,并析出次生α相,合金强度有所增加,塑性略有降低,且拉伸断口表面呈现等轴状韧窝特征.固溶温度为单相区时,组织中初生α相消失,且出现明显的晶界α相,此时组织主要由粗大β晶粒构成.发现无论是否进行时效处理,合金经单相区温度固溶处理后的塑性均较差,合金的拉伸断口微观结构为岩石状形态,且撕裂棱特征明显.
Abstract
TA10 titanium alloy was studied by implementing different solution and aging processes.The mi-crostructure and tensile properties of TA10 titanium alloy under different solution and aging processes were investi-gated by means of optical microscope,scanning electron microscope and room temperature tensile test.It is found that when the solution temperature is in the two-phase region,the microstructure of the alloy is mainly composed of primary α phase and fine α'phase.At this time,the strength of the alloy is low and the plasticity is high.After aging treatment,the α'phase disappears and the secondary α phase precipitates.The strength of the alloy increases,the plasticity decreases slightly,and the surface of the tensile fracture shows equiaxed dimple characteristics.When the solution temperature is in the single-phase region,the primary α phase disappears and the obvious grain boundary α appears.At this time,the microstructure is mainly composed of coarse β grains.It is found that the plasticity of the alloy after solution treatment at single-phase temperature is poor whether or not aging treatment has been carried out.The microstructure of the tensile fracture of the alloy is rock-like morphology,and the char-acteristics of torn ridge are obvious.
关键词
TA10钛合金/微观组织/拉伸性能/断口微观形貌Key words
TA10 titanium alloy/microstructure/tensile properties/fracture microstructure引用本文复制引用
出版年
2024
NETL
NSTL
万方数据