Hot Deformation Behavior and Constitutive Relationship of FV520B Martensitic Stainless Steel
摘 要
采用Gleeble-3500型热模拟试验机对FV520B马氏体不锈钢进行了单道次等温热压缩试验,研究了该不锈钢在变形温度为850~1 150℃和应变速率为0.005~5.000 s-1条件下的热变形行为,根据应力-应变曲线并基于Zener-Hollomon参数和Arrhenius双曲正弦方程,建立了该不锈钢在高温压缩时的本构方程,并对该本构方程进行了修正和试验验证。结果表明:FV520B马氏体不锈钢的流变应力随着变形温度的升高或应变速率的减小而降低;在0.005 s-1、1 000~1 150℃或0.050~5.000 s-1、1 075~1 150℃条件下,该不锈钢发生了较明显的动态再结晶;在0.005 s-1、850℃,5.000 s-1、850℃和5.000 s-1、925℃条件下,由建立的本构方程计算得到的流变应力与试验值存在较大的误差;对本构方程进行修正之后,流变应力的预测值与试验值的相关系数为0.997 88,平均相对误差为2.225%,修正后的本构方程可以准确地预测该不锈钢的热变形流变应力。
Abstract
The hot deformation behavior of FV520B martensitic stainless steel was investigated by single pass isothermal compression test on the Gleeble-3500 thermal simulation machine at the deformation temperatures of 850-1 150℃ and stain rates of 0.005-5.000 s-1. According to the stress-strain curves and on the basis of Zener-Hollomon parameter and the Arrhenius hyperbolic-sine equation, the constitutive equation of the stainless steel during high temperature compression was established, and was corrected and verified by experiments. The results show that the flow stress of FV520B martensitic stainless steel decreased with the increase of deformation temperature or the decrease of strain rate. The dynamic recrystallization occurred obviously in the stainless steel at 0.005 s-1, 1 000-1 150℃ and 0.050-5.000 s-1, 1 075-1 150℃. The errors between the predicted flow stresses by the constitutive equation and the experimental values were relatively large under the conditions of 0.005 s-1, 850℃ and 5.000 s-1, 850℃ or 925℃. After the constitutive equation was corrected, the correlation coefficient between the predicted flow stress and the experimental value was 0.997 88, and the average relative error was 2.225%. The corrected constitutive equation predicted the hot deformation flow stress of the stainless steel accurately.
中图分类号 TG142.71 DOI 10.11973/jxgccl201807014
所属栏目 物理模拟与数值模拟
基金项目
收稿日期 2017/7/5
修改稿日期 2018/5/17
网络出版日期
作者单位点击查看
备注黄丹(1991-),女,江西鹰潭人,硕士研究生
引用该论文: HUANG Dan,FENG Wei. Hot Deformation Behavior and Constitutive Relationship of FV520B Martensitic Stainless Steel[J]. Materials for mechancial engineering, 2018, 42(7): 67~72
黄丹,冯玮. FV520B马氏体不锈钢的热变形行为和本构关系[J]. 机械工程材料, 2018, 42(7): 67~72
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参考文献
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【2】WU Q G, CHEN X D, FAN Z C, et al. Engineering fracture assessment of FV520B steel impeller subjected to dynamic loading[J].Engineering Fracture Mechanics,2015,146:210-223.
【3】JOHNSON G, COOK W H. Fracture characterstics of three metals subjected to various strains, strain rates, temperatures and pressures[J]. Engineering Fracture Mechanics,1985, 21(1):31-48.
【4】SELLARS C M, MCTEGART W J. On the mechanism of hot deformation[J]. Acta Metallurgica, 1966, 14(9):1136-1138.
【5】ZERILLI F J, ARMSTRONG R W. Dislocation-mechanics-based constitutive relations for material dynamics calculations[J]. Journal of Applied Physics, 1987, 61(5):1816-1825.
【6】程晓农, 朱晶晶, 罗锐, 等. 新型CHDG-A06奥氏体不锈钢的热变形行为[J]. 机械工程材料,2017, 41(3):98-102.
【7】HAN Y, WU H, ZHANG W, et al. Constitutive equation and dynamic recrystallization behavior of as-cast 254SMO super-austenitic stainless steel[J]. Materials and Design, 2015, 69:230-240.
【8】马龙腾, 王立民, 胡劲, 等. AISI403马氏体不锈钢的热变形特性研究[J]. 材料工程, 2013,41(5):38-43.
【9】张威, 闫东娜, 邹德宁, 等. 超低碳13Cr-5Ni-2Mo马氏体不锈钢热变形行为及本构关系[J]. 钢铁, 2012, 47(5):69-74.
【10】袁武华, 龚雪辉, 孙永庆, 等. 0Cr16Ni5Mo低碳马氏体不锈钢的热变形行为及其热加工图[J]. 材料工程, 2016, 44(5):8-14.
【11】牛靖, 董俊明, 付永红,等. 时效对FV520(B)钢组织和性能的影响[J]. 金属热处理, 2007,32(4):30-33.
【12】张敏, 唐江, 李继红, 等. 合金元素锰和镍对FV520(B)钢焊接接头组织与力学性能的影响[J]. 机械工程材料, 2015, 39(5):58-62.
【13】李继红, 刘娟娟, 张敏, 等. 热处理工艺对FV520(B)钢焊接接头耐蚀性能的影响[J]. 机械工程材料,2017,41(1):43-46.
【14】ZENER C, HOLLOMON J H. Effect of strain rate upon plastic flow of steel[J]. Journal of Applied Physics, 1944, 15(1):22-32.
【15】PENG X N, GUO H Z, SHI Z F, et al. Constitutive equations for high temperature flow stress of TC4-DT alloy incorporating strain, strain rate and temperature[J]. Materials and Design, 2013, 50(17):198-206.
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