Search Results - "Robert O. Ritchie"

The conflicts between strength and toughness by Ritchie, Robert O.

“…The attainment of both strength and toughness is a vital requirement for most structural materials; unfortunately these properties are generally mutually…”
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Tunable stacking fault energies by tailoring local chemical order in CrCoNi medium-entropy alloys by Ding, Jun, Yu, Qin, Asta, Mark, Ritchie, Robert O.

“…High-entropy alloys (HEAs) are an intriguing new class of metallic materials due to their unique mechanical behavior. Achieving a detailed understanding of…”
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Toughness and strength of nanocrystalline graphene by Shekhawat, Ashivni, Ritchie, Robert O.

“…Pristine monocrystalline graphene is claimed to be the strongest material known with remarkable mechanical and electrical properties. However, graphene made…”
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Magnetically driven short-range order can explain anomalous measurements in CrCoNi by Walsh, Flynn, Asta, Mark, Ritchie, Robert O.

“…The presence, nature, and impact of chemical short-range order in the multi-principal element alloy CrCoNi are all topics of current interest and debate…”
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Structural Orientation and Anisotropy in Biological Materials: Functional Designs and Mechanics by Liu, Zengqian, Zhang, Zhefeng, Ritchie, Robert O.

“…Biological materials exhibit anisotropic characteristics because of the anisometric nature of their constituents and their preferred alignment within…”
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Making ultrastrong steel tough by grain-boundary delamination by Liu, L, Yu, Qin, Wang, Z, Ell, Jon, Huang, M X, Ritchie, Robert O

“…Developing ultrahigh strength steels that are ductile, fracture resistant, and cost-effective would be attractive for a variety of structural applications. We…”
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A fracture-resistant high-entropy alloy for cryogenic applications by Gludovatz, Bernd, Hohenwarter, Anton, Catoor, Dhiraj, Chang, Edwin H., George, Easo P., Ritchie, Robert O.

“…High-entropy alloys are equiatomic, multi-element systems that can crystallize as a single phase, despite containing multiple elements with different crystal…”
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Tuning element distribution, structure and properties by composition in high-entropy alloys by Ding, Qingqing, Zhang, Yin, Chen, Xiao, Fu, Xiaoqian, Chen, Dengke, Chen, Sijing, Gu, Lin, Wei, Fei, Bei, Hongbin, Gao, Yanfei, Wen, Minru, Li, Jixue, Zhang, Ze, Zhu, Ting, Ritchie, Robert O., Yu, Qian

“…High-entropy alloys are a class of materials that contain five or more elements in near-equiatomic proportions 1 , 2 . Their unconventional compositions and…”
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Multiscale Toughening Mechanisms in Biological Materials and Bioinspired Designs by Huang, Wei, Restrepo, David, Jung, Jae‐Young, Su, Frances Y., Liu, Zengqian, Ritchie, Robert O., McKittrick, Joanna, Zavattieri, Pablo, Kisailus, David

“…Biological materials found in Nature such as nacre and bone are well recognized as light‐weight, strong, and tough structural materials. The remarkable…”
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Atomistic simulations of dislocation mobility in refractory high-entropy alloys and the effect of chemical short-range order by Yin, Sheng, Zuo, Yunxing, Abu-Odeh, Anas, Zheng, Hui, Li, Xiang-Guo, Ding, Jun, Ong, Shyue Ping, Asta, Mark, Ritchie, Robert O.

“…Refractory high-entropy alloys (RHEAs) are designed for high elevated-temperature strength, with both edge and screw dislocations playing an important role for…”
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Exceptional damage-tolerance of a medium-entropy alloy CrCoNi at cryogenic temperatures by Gludovatz, Bernd, Hohenwarter, Anton, Thurston, Keli V. S., Bei, Hongbin, Wu, Zhenggang, George, Easo P., Ritchie, Robert O.

“…High-entropy alloys are an intriguing new class of metallic materials that derive their properties from being multi-element systems that can crystallize as a…”
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Dislocation mechanisms and 3D twin architectures generate exceptional strength-ductility-toughness combination in CrCoNi medium-entropy alloy by Zhang, Zijiao, Sheng, Hongwei, Wang, Zhangjie, Gludovatz, Bernd, Zhang, Ze, George, Easo P., Yu, Qian, Mao, Scott X., Ritchie, Robert O.

“…Combinations of high strength and ductility are hard to attain in metals. Exceptions include materials exhibiting twinning-induced plasticity. To understand…”
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Real-time observations of TRIP-induced ultrahigh strain hardening in a dual-phase CrMnFeCoNi high-entropy alloy by Chen, Sijing, Oh, Hyun Seok, Gludovatz, Bernd, Kim, Sang Jun, Park, Eun Soo, Zhang, Ze, Ritchie, Robert O., Yu, Qian

“…Strategies involving metastable phases have been the basis of the design of numerous alloys, yet research on metastable high-entropy alloys is still in its…”
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Strong and Tough Bioinspired Additive-Manufactured Dual-Phase Mechanical Metamaterial Composites by Yin, Sha, Guo, Weihua, Wang, Huitian, Huang, Yao, Yang, Ruiheng, Hu, Zihan, Chen, Dianhao, Xu, Jun, Ritchie, Robert O.

“…•Bioinspired dual-phase metamaterials are designed with lattice materials as constituent phases•Stiffness, strength, toughness and specific energy absorption…”
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Nanoscale origins of the damage tolerance of the high-entropy alloy CrMnFeCoNi by Zhang, ZiJiao, Mao, M. M., Wang, Jiangwei, Gludovatz, Bernd, Zhang, Ze, Mao, Scott X., George, Easo P., Yu, Qian, Ritchie, Robert O.

“…Damage tolerance can be an elusive characteristic of structural materials requiring both high strength and ductility, properties that are often mutually…”
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Failure mechanisms of single-crystal silicon electrodes in lithium-ion batteries by Shi, Feifei, Song, Zhichao, Ross, Philip N., Somorjai, Gabor A., Ritchie, Robert O., Komvopoulos, Kyriakos

“…Long-term durability is a major obstacle limiting the widespread use of lithium-ion batteries in heavy-duty applications and others demanding extended…”
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On the damage tolerance of 3-D printed Mg-Ti interpenetrating-phase composites with bioinspired architectures by Zhang, Mingyang, Zhao, Ning, Yu, Qin, Liu, Zengqian, Qu, Ruitao, Zhang, Jian, Li, Shujun, Ren, Dechun, Berto, Filippo, Zhang, Zhefeng, Ritchie, Robert O.

“…Bioinspired architectures are effective in enhancing the mechanical properties of materials, yet are difficult to construct in metallic systems. The…”
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Processing, Microstructure and Mechanical Properties of the CrMnFeCoNi High-Entropy Alloy by Gludovatz, Bernd, George, Easo P., Ritchie, Robert O.

“…Equiatomic multi-component alloys, referred to variously as high-entropy alloys, multi-component alloys, or compositionally complex alloys in the literature,…”
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Ultra-strong tungsten refractory high-entropy alloy via stepwise controllable coherent nanoprecipitations by Li, Tong, Liu, Tianwei, Zhao, Shiteng, Chen, Yan, Luan, Junhua, Jiao, Zengbao, Ritchie, Robert O., Dai, Lanhong

“…High-performance refractory alloys with ultrahigh strength and ductility are in demand for a wide range of critical applications, such as plasma-facing…”
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On the Mechanistic Origins of Toughness in Bone by Launey, Maximilien E., Buehler, Markus J., Ritchie, Robert O.

“…One of the most intriguing protein materials found in nature is bone, a material composed of assemblies of tropocollagen molecules and tiny hydroxyapatite…”
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