基于DIC方法的不同退火温度下Cu-Ni19合金损伤演变研究

魏亮鱼, 李磊, 崔晓, 刘道启

魏亮鱼, 李磊, 崔晓, 刘道启. 基于DIC方法的不同退火温度下Cu-Ni19合金损伤演变研究[J]. 工程力学, 2020, 37(4): 227-235. DOI: 10.6052/j.issn.1000-4750.2019.04.0239
引用本文: 魏亮鱼, 李磊, 崔晓, 刘道启. 基于DIC方法的不同退火温度下Cu-Ni19合金损伤演变研究[J]. 工程力学, 2020, 37(4): 227-235. DOI: 10.6052/j.issn.1000-4750.2019.04.0239
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WEI Liang-yu, LI Lei, CUI Xiao, LIU Dao-qi. STUDY ON DAMAGE EVOLUTIONG OF Cu-Ni19 ALLOY AT DIFFERENT ANNEALING TEMPERATURES BASED ON DIC METHOD[J]. Engineering Mechanics, 2020, 37(4): 227-235. DOI: 10.6052/j.issn.1000-4750.2019.04.0239
Citation: WEI Liang-yu, LI Lei, CUI Xiao, LIU Dao-qi. STUDY ON DAMAGE EVOLUTIONG OF Cu-Ni19 ALLOY AT DIFFERENT ANNEALING TEMPERATURES BASED ON DIC METHOD[J]. Engineering Mechanics, 2020, 37(4): 227-235. DOI: 10.6052/j.issn.1000-4750.2019.04.0239
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基于DIC方法的不同退火温度下Cu-Ni19合金损伤演变研究

  • 内蒙古工业大学应用力学系, 内蒙古, 呼和浩特 010051

基金项目: 国家自然科学基金项目（11002065）；内蒙古自然科学基金项目（2019MS01015）
详细信息
    作者简介:

    魏亮鱼(1994-),男,甘肃人,硕士生,主要从事铜合金损伤和力学性能研究(E-mail:1361718905@qq.com);崔晓(1994-),女,辽宁人,硕士生,主要从事铝合金可靠性研究(E-mail:1522927326@qq.com);刘道启(1961-),男,内蒙古人,副教授,硕士,主要从事能源和电力工程中的力学问题研究(E-mail:liudaoqi123@163.com).

    通讯作者:

    李磊(1980-),男,内蒙古人,讲师,硕士,主要从事材料损伤和材料疲劳性能研究(E-mail:leillt@163.com).

  • 中图分类号: TG146.1;TG156.2

STUDY ON DAMAGE EVOLUTIONG OF Cu-Ni19 ALLOY AT DIFFERENT ANNEALING TEMPERATURES BASED ON DIC METHOD

  • Department of Mechanics, Inner Mongolia University of Technology, Hohhot, Inner Mongolia 010051, China

摘要

    摘要
  • 摘要: 采用MTS-Landmark材料试验机及LEICA-LM/DM光学显微镜，结合数字图像相关性（DIC）分析方法，对不同退火温度下Cu-Ni19合金的拉伸力学性能和微观组织进行了实验研究，分析了不同退火温度下大变形区域和小变形区域Cu-Ni19合金的损伤演变行为。结果表明：随着退火温度升高，Cu-Ni19合金的屈服强度和抗拉强度减小，微观组织发生回复再结晶，组织趋于等轴化。Cu-Ni19合金的损伤演变分为均匀变形和局部变形阶段，根据试样变形特征分为大变形区域和小变形区域。在小变形区域，试样以均匀变形为主，晶粒变形程度较小。在大变形区域，试样以快速变形为主，晶粒变形程度较大，同时小变形区域基本停止变形。在大变形区和小变形区试样的损伤因子都随着应变的增加而增大，损伤变形速率和临界损伤因子随着退火温度的升高而减小。基于DIC方法建立了不同退火温度下大变形区域和小变形区域Cu-Ni19合金试样的损伤演变方程，有效地反映了不同退火温度下大变形区域和小变形区域Cu-Ni19合金的损伤演变规律。
    Abstract: Using MTS-Landmark material testing machine and LEICA-LM/DM optical properties microscope, combined with digital image correlation (DIC) method, the tensile mechanical properties and the microstructures of Cu-Ni19 alloy under different annealing temperatures were analyzed. The damage evolution behaviors of different deformation zones under different annealing temperatures were analyzed. The results show that the yield strength and the tensile strength of Cu-Ni19 alloy decrease with the increase of the annealing temperature. Moreover, the recovery and recrystallization occur in the microstructure and tend to be equiaxed. The damage evolution of the Cu-Ni19 alloy can be divided into uniform deformation stage and local deformation stage. Also, the deformation zone of the sample is divided into large deformation zone and small deformation zone according to the deformation characteristics. In small deformation zone, the sample is mainly in uniform deformation and the deformation degree of grain increases slightly. In large deformation zone, the sample is mainly in rapid deformation and the deformation degree of grain increases significantly. Moreover, the deformation of small deformation zone has stopped basically. In both deformation zones, the damage factor increases with the increase of the strain, the damage deformation rate and the critical damage factor decrease with the increase of the annealing temperature. The damage evolution equation of Cu-Ni19 sample based on DIC method in both deformation zones under different annealing temperatures can reflect the law of damage evolution for Cu-Ni19 in both deformation zones effectively.
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出版历程
  • 收稿日期:  2019-04-29
  • 修回日期:  2019-09-19
  • 刊出日期:  2020-04-13

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