Factors Influencing Tensile Ductility of OFHC Cu Having Different Ultrafine Grained Structures

The processing of bulk metals through the application of severe plastic deformation provides an opportunity for achieving exceptional grain refinement to the submicrometer or even the nanometer range. This paper examines the characteristics of metals processed by equal-channel angular pressing with special emphasis on the levels of ductility that may be attained. It is shown that the amount of ductility is dependent not only upon the composition of the material but also, and to a major extent, upon the testing temperature. Specifically, the ductilities are often low at ambient temperatures where the strength of the as-processed material is relatively high but, by contrast, exceptionally high superplastic ductilities may be achieved over short ranges of strain rate when testing at elevated temperatures.

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Enhanced tensile ductility and strength of electrodeposited ultrafine-grained nickel with a desired bimodal microstructure

Materials Science and Engineering A ◽

10.1016/j.msea.2017.06.063 ◽

2017 ◽

Vol 701 ◽

pp. 196-202 ◽

Cited By ~ 10

Author(s):

Qian Zhang ◽

Ying Liu ◽

Yongsheng Liu ◽

Yanhong Ren ◽

Yanxia Wu ◽

...

Keyword(s):

Tensile Ductility ◽

Bimodal Microstructure ◽

Ultrafine Grained

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High tensile ductility and high strength in ultrafine-grained low-carbon steel

Materials Science and Engineering A ◽

10.1016/j.msea.2010.01.072 ◽

2010 ◽

Vol 527 (10-11) ◽

pp. 2798-2801 ◽

Cited By ~ 41

Author(s):

T.S. Wang ◽

Z. Li ◽

B. Zhang ◽

X.J. Zhang ◽

J.M. Deng ◽

...

Keyword(s):

Carbon Steel ◽

Tensile Ductility ◽

Low Carbon Steel ◽

High Strength ◽

Low Carbon ◽

Ultrafine Grained

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High ductility of ultrafine-grained steel via phase transformation

Journal of Materials Research ◽

10.1557/jmr.2008.0213 ◽

2008 ◽

Vol 23 (6) ◽

pp. 1578-1586 ◽

Cited By ~ 12

Author(s):

S. Cheng ◽

H. Choo ◽

Y.H. Zhao ◽

X-L. Wang ◽

Y.T. Zhu ◽

...

Keyword(s):

Phase Transformation ◽

Tensile Ductility ◽

High Strength ◽

Strain Rate Effect ◽

Inhomogeneous Deformation ◽

Ultrafine Grained ◽

Structural Applications ◽

Order Of Magnitude ◽

Strength And Ductility ◽

Ultrafine Grained Steel

There is often a tradeoff between strength and ductility, and the low ductility of ultrafine-grained (UFG) materials has been a major obstacle to their practical structural applications despite their high strength. In this study, we have achieved a ∼40% tensile ductility while increasing the yield strength of FeCrNiMn steel by an order of magnitude via grain refinement and deformation-induced martensitic phase transformation. The strain-rate effect on the inhomogeneous deformation behavior and phase transformation was studied in detail.

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Tensile Deformation of Ultrafine-Grained Fe-Mn-Al-Ni-C Alloy Studied by In Situ Synchrotron Radiation X-ray Diffraction

Crystals ◽

10.3390/cryst10121115 ◽

2020 ◽

Vol 10 (12) ◽

pp. 1115

Author(s):

Si Gao ◽

Takuma Yoshimura ◽

Wenqi Mao ◽

Yu Bai ◽

Wu Gong ◽

...

Keyword(s):

Synchrotron Radiation ◽

Tensile Deformation ◽

Tensile Ductility ◽

High Strength ◽

X Ray Diffraction ◽

Premature Failure ◽

X Ray ◽

Intermetallic Particles ◽

Ultrafine Grained

Intermetallic compounds are usually considered as deleterious phase in alloy designing and processing since their brittleness leads to poor ductility and premature failure during deformation of the alloys. However, several studies recently found that some alloys containing large amounts of NiAl-type intermetallic particles exhibited not only high strength but also good tensile ductility. To clarify the role of the intermetallic particles in the excellent tensile properties of such alloys, the tensile deformation behavior of an ultrafine-grained Fe-Mn-Al-Ni-C alloy containing austenite matrix and B2 intermetallic particles was investigated by using in situ synchrotron radiation X-ray diffraction in the present study. The elastic stress partitioning behavior of two constituent phases during tensile deformation were quantitively measured, and it was suggested that B2 particles played an important role in the high strength and large tensile ductility of the material.

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