Simultaneously Increasing the Ductility and Strength of Ultra‐Fine‐Grained Pure Copper

Zhao, Yaohua; Bingert, J. F.; Liao, Xiaozhou; Cui, Bai; Han, Ke; Sergueeva, A. V.; Mukherjee, Amiya K.; Valiev, Ruslan Z.; Langdon, Terence G.; Zhu, Yuntian

doi:10.1002/adma.200601472

Cited by 382 publications

(200 citation statements)

References 38 publications

Supporting

Mentioning

193

Contrasting

Unclassified

Order By: Relevance

“…17 It follows that dislocation barriers are required within the grain interior where dislocations can be blocked and accumulate. Some successful strategies to this end include the use of growth twins, 18 deformation twinning, [19][20][21] stacking faults, 22,23 and second-phase particles/precipitates 24 as barriers. Since these approaches can also increase the strength, they often lead to a simultaneous increase in both strength and ductility.…”

Section: Authors' Notementioning

confidence: 99%

Producing Bulk Ultrafine-Grained Materials by Severe Plastic Deformation: Ten Years Later

Valiev

Estrin

Horita

et al. 2016

JOM

404

186

View full text Add to dashboard Cite

It is now well established that the processing of bulk solids through the application of severe plastic deformation (SPD) leads to exceptional grain refinement to the submicrometer or nanometer level. Extensive research over the last decade has demonstrated that SPD processing also produces unusual phase transformations and leads to the introduction of a range of nanostructural features, including nonequilibrium grain boundaries, deformation twins, dislocation substructures, vacancy agglomerates, and solute segregation and clustering. These many structural changes provide new opportunities for fine tuning the characteristics of SPD metals to attain major improvements in their physical, mechanical, chemical, and functional properties. This review provides a summary of some of these recent developments. Special emphasis is placed on the use of SPD processing in achieving increased electrical conductivity, superconductivity, and thermoelectricity, an improved hydrogen storage capability, materials for use in biomedical applications, and the fabrication of high-strength metal-matrix nanocomposites.

show abstract

Section: Authors' Notementioning

confidence: 99%

Producing Bulk Ultrafine-Grained Materials by Severe Plastic Deformation: Ten Years Later

Valiev

Estrin

Horita

et al. 2016

JOM

404

186

View full text Add to dashboard Cite

show abstract

“…Twins have been reported to significantly affect the mechanical properties of nanostructured face-centered cubic (fcc) metals and alloys [1][2][3][4][5][6][7][8][9][10]. Importantly, twins have been shown to be able to simultaneously increase the strength and ductility of nanostructured metals, which is attributed to the dislocation interaction with and accumulation at twin boundaries.…”

Section: Introductionmentioning

confidence: 99%

Dislocation–twin interactions in nanocrystalline fcc metals

et al. 2011

View full text Add to dashboard Cite

Dislocation interaction with and accumulation at twin boundaries have been reported to significantly improve the strength and ductility of nanostructured face-centered cubic (fcc) metals and alloys. Here we systematically describe plausible dislocation interactions at twin boundaries. Depending on the characteristics of the dislocations and the driving stress, possible dislocation reactions at twin boundaries include cross-slip into the twinning plane to cause twin growth or de-twinning, formation of a sessile stair-rod dislocation at the twin boundary, and transmission across the twin boundary. The energy barriers for these dislocation reactions are described and compared.

show abstract

“…[6,7] The interactions between twins and gliding dislocations at twin boundaries (TBs) have been observed both experimentally [7][8][9][10][11][12][13][14] and by molecular dynamics (MD) simulations [15][16][17][18] to result in an unusual combination of ultrahigh strength and high ductility. [7,9,[19][20][21][22][23][24] In NC materials, MD simulations [25][26][27] have predicted that single or multiple deformation twins can be formed by emission of Shockley partial dislocations on adjacent {111} planes from grain boundaries. This formation mechanism has been confirmed later by abundant experimental evidence.…”

mentioning

confidence: 99%