Results 11 to 20 of about 264 (147)

Superior strength-ductility synergy by hetero-structuring high manganese steel [PDF]

Materials Research Letters, 2020
Lacking of forest hardening makes low ductility in steels long challenge particularly at high yield strength. Here, we report to make good use of hetero-structuring for superior strength-ductility synergy in high manganese steel.
Xing Fang, Qiqi Xue, Kaiyuan Yu, Runguang Li, Daqiang Jiang, Lei Ge, Yang Ren, Changfeng Chen, Xiaolei Wu   +8 more
doaj   +4 more sources

Atomistic tensile deformation mechanisms in a CrCoNi medium-entropy alloy with gradient nano-grained structure at cryogenic temperature [PDF]

Frontiers in Materials, 2023
Large-scale molecular dynamics (MD) simulations have been utilized to reveal the atomistic deformation mechanisms of a CrCoNi medium-entropy alloy (MEA) with gradient nano-grained (GNG) structure in the present study. Strong strain hardening was observed
Yuhao Tao, Wenqiang Cheng, Wenqiang Cheng, Wei Wang   +3 more
doaj   +7 more sources

Enhanced strength-ductility synergy in a gradient hetero-structured CrCoNi medium-entropy alloy [PDF]

Journal of Materials Research and Technology
A CrCoNi medium-entropy alloy (MEA) with gradient hetero-structure (GHS) composing of gradient nanostructured surface layer and hetero-structured matrix was prepared via a two-step process: pre-cold rolling (CR) deformation and subsequent annealing ...
Hangqi Feng, Hangzhou Zhang, Zhenghong He, Lingling Zhou, Zihan Zhang, Muxin Yang, Weijie Li, Xiaolei Wu, Fuping Yuan, Ying Li   +9 more
doaj   +4 more sources

Heterostructure enables new deformation mechanisms to enhance strength and work hardening [PDF]

Materials Research Letters
Reflection of geometrically necessary dislocations (GNDs) has been reported effective in increasing strength and ductility of dual-phase alloys. However, this mechanism is rarely observed in conventional single-phase alloys. Here we report the activation
Bo Gao, Xinxin Dong, Xuefei Chen, Lirong Xiao, Qi Zhou, Xiaodong Han, Dongdi Yin, Hao Zhou, Yuntian Zhu   +8 more
doaj   +2 more sources

Tailoring size and fraction of coherent L12 nanoprecipitates to achieve strong hardening in medium entropy alloys with heterogeneous grain structures [PDF]

Journal of Materials Research and Technology
Heterogeneous grain structures with coherent L12 nanoprecipitates were constructed in a medium entropy alloy with chemical composition of Co34.5Cr32Ni27.5Al3Ti3 (at. %).
Guohao Qin, Zihan Zhang, Wei Wang, Xiaolei Wu, Fuping Yuan   +4 more
doaj   +4 more sources

Simultaneously improved strength and ductility yet strain-hardenable 316L stainless steel by sigma phase and hetero-structuring [PDF]

Materials & Design
In this study, we produced both homogeneous and heterogeneous-structured 316L austenitic stainless steels (SSs), each exhibiting comparable levels of yield strength (YS).
Young-Kyun Kim, Sang Hun Shim, Yong Keun Kim, Ka Ram Lim, Young-Sang Na   +4 more
doaj   +2 more sources

Trimodal Grain Structured Aluminum Matrix Composites Regulated by Transitional Hetero-Domains [PDF]

Metals
Aluminum matrix composites (AMCs) with hetero-grains exhibit high strength with good ductility. A trimodal grain structure composed of ultrafine grains (UFGs), fine grains (FGs) and coarse grains (CGs) prevents the pre-mature cracking of hetero-zone ...
Zhiqi Guo, Xiaowen Fu, Sijie Wang, Zhanqiu Tan, Genlian Fan, Zhenming Yue, Zhiqiang Li   +6 more
doaj   +2 more sources

Achieving synergistic strength-ductility enhancement in a hierarchical hetero-lamellar AlCoCrFeNi2.1 eutectic high-entropy alloy via facile hot-rolling strategy [PDF]

Materials & Design
Eutectic high-entropy alloys (EHEAs) have attracted considerable interest due to their superior multifunctional performance. However, the inherent tendency of stress concentration at irregular phase boundaries frequently leads to premature fracture. This
Qidong Ren, Tianxin Li, Hengke Xie, Yuhao Jia, Mingpan Wan, Chaowen Huang, Chaoyi Chen, Junqi Li, Yiping Lu   +8 more
doaj   +2 more sources

Achieving Superior Ductility at High Strain Rate in a 1.5 GPa Ultrahigh-Strength Steel without Obvious Transformation-Induced Plasticity Effect [PDF]

Metals
The development of ultrahigh-strength steels with good ductility is crucial for improving the crashworthiness of automobiles. In the present work, the mechanical responses and deformation behaviors of 1.5 GPa ultrahigh-strength steel were systematically ...
Yao Lu, Tianxing Ma, Zhiyuan Liang, Li Liu   +3 more
doaj   +2 more sources

Ultrahigh Strength and Exceptional Work Hardening in a Hierarchical-Structured Alloy via Hetero-Interface-Mediated Twinning. [PDF]

Adv Sci (Weinh)
This study presents a novel strategy for achieving exceptional work hardening in ultrahigh‐strength alloys by designing hierarchically heterogeneous dual‐phase (HHDP) structures, where hetero‐deformation‐induced strain gradients activate deformation twinning.
Yang Y, Pang J, Zhang H, Shen J, Xing Z, Sun Y, Wang A, Oliveira JP, Wang W, Jiao Z.   +9 more
europepmc   +2 more sources