A review of dynamic recrystallization phenomena in metallic materials

[Zhang, P.; Li, S. X.; Zhang, Z. F.] Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China.;Zhang, ZF (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China;zhfzhang@imr.ac.cn

General relationship between strength and hardness

High entropy alloys: A focused review of mechanical properties and deformation mechanisms

Strengthening Mechanisms in a High-Strength Bulk Nanostructured Cu-Zn-Al Alloy Processed Via Cryomilling and Spark Plasma Sintering

Formation of microcracks is a critical problem in polymers and polymer composites during their service in struc- tural applications. Development and coalescence of microcracks would bring about catastrophic failure of the materials and then reduce their lifetimes. Therefore, early sensing, diagnosis and repair of microcracks become necessary for removing the latent perils. In this context, the materials possessing self-healing function are ideal for long-term operation. Self-repair- ing polymers and polymer composites have attracted increasing research interests. Attempts have been made to develop solutions in this field. The present article reviews state-of-art of the achievements on the topic. According to the ways of healing, the smart materials are classified into two categories: (i) intrinsic self-healing ones that are able to heal cracks by the polymers themselves, and (ii) extrinsic in which healing agent has to be pre-embedded. The advances in this field show that selection and optimization of proper repair mechanisms are prerequisites for high healing efficiency. It is a challenging job to either invent new polymers with inherent crack repair capability or integrate existing materials with novel healing system.

http://www.expresspolymlett.com/letolt.php?file=EPL-0000602&mi=c

Self healing in polymers and polymer composites. Concepts, realization and outlook: A review

Microstructural evolution and mechanical properties of Cu–Al alloys subjected to equal channel angular pressing

Fully recrystallized CoCrFeMnNi high entropy alloys (HEAs) with different grain sizes ranging from 503 nm to 88.9 µm were fabricated by cold rolling and controlled annealing. Tensile tests were conducted at ambient temperature, and deformation microstructures were investigated using electron channeling contrast imaging (ECCI) and transmission electron microscopy (TEM) techniques. It is found that strain-hardening curves changed dramatically with grain refinement. Deformation twinning prevails when the grain size is coarse, but it is absent when the grain size falls in the ultrafine-grained (UFG) regime. The transition of twinning behavior is supposed to be determined by the increased twinning stress with grain refinement. It is indicated that the twinning behavior of the HEAs is strongly dependent on the competition between the flow stress and critical twinning stress with grain refinement.

Huajie Yang

Papers

Microstructural evolution and mechanical properties of Cu–Al alloys subjected to equal channel angular pressing

Transition of twinning behavior in CoCrFeMnNi high entropy alloy with grain refinement

Morphologies, orientation relationships and evolution of Cu6Sn5 grains formed between molten Sn and Cu single crystals

Cyclic deformation behavior of as-extruded Mg–3%Al–1%Zn

High temperature healing of Ti2AlC: On the origin of inhomogeneous oxide scale