湖南工业大学学报2024，Vol.38Issue(3)：102-106,5.DOI:10.3969/j.issn.1673-9833.2024.03.014
热处理工艺对Nb-Ti-Al基低密度铌合金力学性能及组织形貌的影响
Study on the Influence of Heat Treatment Process on the Mechanical Properties and Microstructure of Nb-Ti-Al-Based Low Density Niobium Alloys
摘要
Abstract
With Nb-Ti-Al-based low-density niobium alloy subjected to heat treatment under different high temperature conditions,the samples coated with the alloy are melted at a high temperature of 1 300℃for 30 minutes.By using INSTRON4505 universal testing machines,metallographic microscopes,scanning electron microscopes,and energy spectrum analyzers,a comparative analysis has been made of the mechanical properties(with a tensil strength of/бb,a yield strength of/б0.2 and elongation),metallographic structure,and fracture morphology of the heat-treated sample at room temperature(25℃).The results show that for every 100℃increase in the melting temperature(t≥900℃),the tensile strength decreases by 9.23%,the yield strength decreases by 9.11%,the elongation decreases by 9.59%,while the proportion of grain size increases by 21.43%.With the melting temperature reaching higher than 1 200℃,the sample experiences a fracture by only measuring the tensile strength value,showing that with an increase of the melting temperature gradient,the mechanical properties of the sample substrate decrease correspondingly,the grain size and hardness increase continuously,while the plasticity and toughness decrease continuously as well.关键词
Nb-Ti-Al基低密度铌合金/热处理工艺/力学性能/金相组织/断口形貌Key words
Nb-Ti-Al-based low density niobium alloy/heat treatment technology/mechanical property/metallographic structure/fracture morphology分类
矿业与冶金引用本文复制引用
李福成..热处理工艺对Nb-Ti-Al基低密度铌合金力学性能及组织形貌的影响[J].湖南工业大学学报,2024,38(3):102-106,5.基金项目
稀有金属特种材料国家重点实验室研发平台建设基金资助项目(2019BDC05001) （2019BDC05001）
