GH738合金双锥试样热压缩行为
发布时间：2018-08-12 13:31
【摘要】：利用双锥试样热压缩实验研究了GH738合金的动态再结晶行为,通过有限元软件计算得到样品纵剖面应变和温度的定量分布规律,进而构建合金动态再结晶的动力学曲线,并分析了热压缩温度对再结晶动力学的影响规律。结果表明:将双锥试样压缩至高12 mm时,其纵剖面中心线位置的真应变量呈对称分布且连续变化,边缘最低应变量为0.47,心部应变量峰值为2.61,该区域温度基本保持稳定;动态再结晶比例随真应变呈"S"形曲线变化,随着预热温度的降低,再结晶形核所需应变量增大,晶粒尺寸减小,但完成再结晶所需应变量无明显变化。
[Abstract]:The dynamic recrystallization behavior of GH738 alloy was studied by thermal compression test of double cone specimen. The quantitative distribution of strain and temperature in the longitudinal section of the sample was calculated by finite element software, and then the dynamic curve of dynamic recrystallization of the alloy was constructed. The effect of hot compression temperature on recrystallization kinetics was analyzed. The results show that the true strain of the center line of the longitudinal profile is symmetrical and continuously varied when the biconical specimen is compressed to 12mm, the lowest strain at the edge is 0.47, the peak value of the central strain is 2.61, and the temperature in the region is basically stable. The dynamic recrystallization ratio changes with the true strain as "S" curve. With the decrease of preheating temperature, the strain of recrystallization nucleation increases and the grain size decreases, but the required strain to complete recrystallization has no obvious change.
【作者单位】： 江苏省先进结构材料与应用技术重点实验室;南京工程学院材料工程学院;
【基金】：国家自然科学基金青年科学基金项目(No.51301085) 南京工程学院引进人才科研启动基金项目(No.YKJ201306)
【分类号】：TG132.3
本文编号：2179202
[Abstract]:The dynamic recrystallization behavior of GH738 alloy was studied by thermal compression test of double cone specimen. The quantitative distribution of strain and temperature in the longitudinal section of the sample was calculated by finite element software, and then the dynamic curve of dynamic recrystallization of the alloy was constructed. The effect of hot compression temperature on recrystallization kinetics was analyzed. The results show that the true strain of the center line of the longitudinal profile is symmetrical and continuously varied when the biconical specimen is compressed to 12mm, the lowest strain at the edge is 0.47, the peak value of the central strain is 2.61, and the temperature in the region is basically stable. The dynamic recrystallization ratio changes with the true strain as "S" curve. With the decrease of preheating temperature, the strain of recrystallization nucleation increases and the grain size decreases, but the required strain to complete recrystallization has no obvious change.
【作者单位】： 江苏省先进结构材料与应用技术重点实验室;南京工程学院材料工程学院;
【基金】：国家自然科学基金青年科学基金项目(No.51301085) 南京工程学院引进人才科研启动基金项目(No.YKJ201306)
【分类号】：TG132.3
【相似文献】
相关期刊论文 前7条
1 刘兴富;;双锥零件特性尺寸的测量[J];机械工业标准化与质量;2006年08期
2 刘兴富;;双锥零件特性尺寸的测量——一个由基准引发的测量问题[J];计量技术;2006年04期
3 冯可华;双锥回转体零件的成形[J];模具工业;2003年03期
4 冯可华;双锥回转体零件的成形及模具设计[J];模具制造;2002年10期
5 张光辉;;花键孔齿轮精车用双锥涨套结构设计[J];机械;1993年05期
6 张韶华,徐伟;新型锻压机——双锥辊轴向模轧机研制[J];锻压装备与制造技术;2004年04期
7 ;[J];;年期
，本文编号：2179202
本文链接：https://www.wllwen.com/kejilunwen/jiagonggongyi/2179202.html
