High Strength and High Uniform Ductility in a Severely Deformed Iron Alloy by Lattice Softening and Multimodal-structure Formation

Kaveh Edalati; Tadahiko Furuta; Takeshi Daio; Shigeru Kuramoto; Zenji Horita

doi:10.1080/21663831.2015.1050126

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High Strength and High Uniform Ductility in a Severely Deformed Iron Alloy by Lattice Softening and Multimodal-structure Formation

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- High Strength and High Uniform Ductility in a Severely Deformed Iron Alloy by Lattice Softening and Multimodal-structure Formation
- Materials Research Letters Vol. 3, Issue 4, Pages: 197-202(2015)
- 作者机构：
  
  1. WPI International Institute for Carbon-Neutral Energy Research (WPI-I2CNER) Kyushu University Fukuoka819,Japan,0395
  2. Department of Materials Science and Engineering Faculty of Engineering Kyushu University
  3. Frontier Research Center Toyota Central R&D Laboratories Inc. Nagakute
  4. International Research Center for Hydrogen Energy Kyushu University
  5. Department of Mechanical Engineering College of Engineering Ibaraki University 4-12-1 Nakanarusawa
- 作者简介：
- 基金信息：
- DOI：10.1080/21663831.2015.1050126
  CLC：
- Online First：26 May 2015，
  
  Published：2015
- 稿件说明：
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Kaveh Edalati, Tadahiko Furuta, Takeshi Daio, et al. High Strength and High Uniform Ductility in a Severely Deformed Iron Alloy by Lattice Softening and Multimodal-structure Formation[J]. Materials Research Letters, 2015, 3(4): 197-202.
DOI：

Kaveh Edalati, Tadahiko Furuta, Takeshi Daio, et al. High Strength and High Uniform Ductility in a Severely Deformed Iron Alloy by Lattice Softening and Multimodal-structure Formation[J]. Materials Research Letters, 2015, 3(4): 197-202. DOI： 10.1080/21663831.2015.1050126.

摘要

Abstract

Despite high strength of nanostructured alloys

they usually exhibit poor uniform ductility. For many applications

it is an important issue to design new nanostructured alloys which have both high strength and high uniform ductility. In this study

an Fe–Ni–Al–C alloy with ultrahigh tensile strength of 1.9–2.2 GPa and high uniform ductility of 16–19% was developed by concurrent employment of several strategies: (i) appropriate choice of chemical compositions for lattice softening

(ii) severe plastic deformation using the high-pressure torsion method for grain refinement

and (iii) control of strain level for multimodal-structure formation composed of equiaxed nanograins

lamellar coarse grains and fine precipitates.

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