铸造技术2023，Vol.44Issue(12)：1109-1115,7.DOI:10.16410/j.issn1000-8365.2023.3242
GH4169镍基合金板材高温拉伸性能研究
Study on the Tensile Properties of GH4169 Alloy Sheet at High Temperature
摘要
Abstract
GH4169 nickel-based alloy material with a plate thickness of 5 mm was subjected to high-temperature tensile experiments at seven test temperatures(450～1 050 ℃)and strain rates of 0.01 and 0.001 s-1,respectively,using high-temperature tensile equipment in a furnace.The elongation,yield strength and tensile strength of the material at different temperatures were obtained,and the high-temperature tensile deformation behavior was analysed,which provided data support for the preparation of high-temperature tensile forming and service performance evaluation of the alloy sheet.The results show that when the strain rate is 0.001 s-1 and the temperature is higher than 850 ℃,the elongation of the GH4169 nickel-based alloy plate continues to increase with increasing temperature and reaches up to 112％at 1 050 ℃.The tensile strength decreases to 66 MPa with increasing temperature,which is only 7.1％at room temperature.When the strain rate is 0.01 s-1,the elongation and tensile strength changes of the GH4169 nickel-based alloy sheet have similar trends.When the temperature is lower than 800 ℃,the elongation and tensile strength do not change much with temperature,and a high strength is maintained.However,when the temperature increases to 850 ℃,the material has an obvious softening phenomenon,the strain hardening index n value decreases with increasing temperature,and the plastic deformation increases significantly.关键词
GH4169镍基合金/高温拉伸/伸长率/抗拉强度/应变硬化指数/应变速率Key words
GH4169 nickel-based alloy/high-temperature tensile/elongation/tensile strength/strain hardening index/strain rate分类
金属材料引用本文复制引用
王梦真,林健,呼啸,王大刚,卫强..GH4169镍基合金板材高温拉伸性能研究[J].铸造技术,2023,44(12):1109-1115,7.基金项目
北京市自然科学基金-海淀原始创新联合基金(L212022) （L212022）
国家自然科学基金(51005004) （51005004）
