不同温度下ZTA15铸造钛合金的组织和性能研究  

Study on Microstructures and Tensile Properties of ZTA15 Cast Titanium Alloy at Different Temperatures

作　　者：石峰 杨国娟[2] 陈冬梅[3] 张健辉 纪志军 SHI Feng;YANG Guojuan;CHEN Dongmei;ZHANG Jianhui;JI Zhijun(AECC Beijing Institute of Aeronautical Materials,Beijing 10095,China;AVIC Shenyang Aircraft Company Limited,Shenyang 110034,Liaoning China;AVIC Shenyang Aircraft Design&Research Institute,Shenyang 110035,Liaoning China;Beijing Engineering Research Center of Advanced Titanium Alloy Precision Forming Technology,Beijing 100095,China)

机构地区：[1]中国航发北京航空材料研究院,北京100095 [2]沈阳飞机工业(集团)有限公司,辽宁沈阳110034 [3]沈阳飞机设计研究所,辽宁沈阳110035 [4]北京市先进钛合金精密成型工程技术研究中心,北京100095

出　　处：《铸造工程》2024年第3期1-6,共6页Foundry Engineering

基　　金：国家重点研发计划(2020YFB2008300)。

摘　　要：以ZTA15铸造钛合金为研究对象,测试了不同温度下ZTA15铸造钛合金拉伸性能,并对金相组织和拉伸断口形貌进行了观察。结果表明,ZTA15铸造钛合金单铸板状试样随着拉伸温度的升高,强度逐渐下降,塑性呈先上升后下降的趋势;ZTA15铸造钛合金内部金相组织为魏氏组织,晶内α相呈片层状;ZTA15铸造钛合金的拉伸断口为沿晶断口与穿晶断口的混合状断口,塑性越强,穿晶断裂所占比例越高,韧窝特征越明显;其拉伸韧窝多为非典型长条状韧窝,初步推测与其金相组织中的片层状α相有关;其沿晶断口也非典型的表面光滑冰糖状沿晶断口,而分布着许多长条状韧窝,这同样与金相组织中的片层状晶界α相有关。This paper taking ZTA15 cast titanium alloy as the research object,the tensile properties including strength and plasticity under different tensile temperatures were analyzed,and its metallographic structure and tensile fracture morphology were observed.The results show that the strength of ZTA15 cast titanium alloy single cast plate specimen decreases gradually with the increase of tensile temperature,and the plasticity increases first and then decreases.The internal metallographic structure of ZTA15 cast titanium alloy is widmanstatten structure and intragranular structureαphase is lamellar.The tensile fracture of ZTA15 cast titanium alloy is a mixed fracture of intergranular fracture and transgranular fracture.The stronger the plasticity,the higher the proportion of transgranular fracture and the more obvious the characteristics of dimples.Most of the tensile dimples are atypical long strip dimples,which is preliminarily speculated to be related to the lamellar structure in the metallographic structureαrelated.The intergranular fracture surface is also atypical smooth crystal sugar like intergranular fracture,and many long strip-shaped dimples are distributed,which is also similar to the lamellar grain boundary in the metallographic structureαrelated.

关 键 词：ZTA15铸造钛合金 拉伸性能 组织特征 断口形貌 

分 类 号：TG146.23[一般工业技术—材料科学与工程]