...
首页> 外文期刊>Journal of Materials Research >Improved dislocation density-based models for describing hot deformation behaviors of a Ni-based superalloy
【24h】

Improved dislocation density-based models for describing hot deformation behaviors of a Ni-based superalloy

机译:改进的基于位错密度的模型,用于描述镍基高温合金的热变形行为

获取原文
获取原文并翻译 | 示例
           

摘要

Generally, the obvious work hardening, dynamic recrystallization (DRX), and dynamic recovery behaviors can be found during hot deformation of Ni-based superalloys. In the present study, the classical dislocation density theory is improved by introducing a new dislocation annihilation item to represent the influences of DRX on dislocation density evolution for a Ni-based superalloy. Based on the improved dislocation density theory, the peak strain corresponding to peak stress and the critical strain for initiating DRX can be determined, and the improved DRX kinetics equations and grain size evolution models are developed. The physical framework and algorithmic idea of the improved dislocation density theory are clarified. Moreover, the deformed microstructures are characterized and quantitatively correlated to validate the improved dislocation density theory. It is found that the improved dislocation density-based models can precisely characterize hot deformation and DRX behaviors for the studied superalloy under the tested conditions.
机译:通常,在镍基高温合金热变形过程中会发现明显的加工硬化,动态再结晶(DRX)和动态恢复行为。在本研究中,通过引入新的位错an灭项来表示DRX对镍基高温合金位错密度演变的影响,改进了经典的位错密度理论。基于改进的位错密度理论,可以确定对应于峰值应力的峰值应变和引发DRX的临界应变,并建立改进的DRX动力学方程式和晶粒尺寸演化模型。阐明了改进的位错密度理论的物理框架和算法思想。此外,对变形的微结构进行了表征并进行了定量关联,以验证改进的位错密度理论。发现改进的基于位错密度的模型可以精确地表征所研究条件下所研究的高温合金的热变形和DRX行为。

著录项

  • 来源
    《Journal of Materials Research》 |2016年第16期|2415-2429|共15页
  • 作者单位

    School of Mechanical and Electrical Engineering, Central South University, Changsha 410083, Hunan Province, China, Light Alloy Research Institute of Central South University, Changsha 410083, Hunan Province, China, and State Key Laboratory of High Performance Complex Manufacturing, Changsha 410083, Hunan Province, China;

    School of Mechanical and Electrical Engineering, Central South University, Changsha 410083, Hunan Province, China, and State Key Laboratory of High Performance Complex Manufacturing, Changsha 410083, Hunan Province, China;

    School of Mechanical and Electrical Engineering, Central South University, Changsha 410083, Hunan Province, China, and State Key Laboratory of High Performance Complex Manufacturing, Changsha 410083, Hunan Province, China;

    School of Mechanical and Electrical Engineering, Central South University, Changsha 410083, Hunan Province, China, and State Key Laboratory of High Performance Complex Manufacturing, Changsha 410083, Hunan Province, China;

    School of Mechanical and Electrical Engineering, Central South University, Changsha 410083, Hunan Province, China, and State Key Laboratory of High Performance Complex Manufacturing, Changsha 410083, Hunan Province, China;

    SINTEF Materials and Chemistry, Blindern, 0314 Oslo, Norway;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号