Results 81 to 90 of about 208,968 (293)

Additive Manufacturing of NiTi Shape Memory Alloys for Elastocaloric Applications: A Review

Advanced Functional Materials, EarlyView.
Additive manufacturing enables complex NiTi architectures that overcome key limitations in elastocaloric refrigeration, including poor heat transfer and high mechanical work input. This review surveys recent advances in LPBF‐ and DED‐fabricated NiTi shape memory alloys for elastocaloric applications, highlighting process–structure–performance ...
Ignatius Andre Setiawan, Mohammad Mehrali, Jaka Tušek, Shiva Mohajerani, Xiebin Wang, Dermot Brabazon, Mohammad Elahinia, Mehrshad Mehrpouya   +7 more
wiley   +1 more source

From the Discovery of the Giant Magnetocaloric Effect to the Development of High‐Power‐Density Systems

Advanced Materials Technologies, EarlyView.
The article overviews past and current efforts on caloric materials and systems, highlighting the contributions of Ames National Laboratory to the field. Solid‐state caloric heat pumping is an innovative method that can be implemented in a wide range of cooling and heating applications.
Agata Czernuszewicz, Yaroslav Mudryk, Jun Cui, Lucas Griffith, Duane D. Johnson, Julie Slaughter   +5 more
wiley   +1 more source

Abnormal growth of austenite grain in continuously cast slab during hot charging processes

Journal of Materials Research and Technology
The hot charging(HC) experiments for 20CrMo steel were carried out based on the temperature history in the plant, and the evolution of austenite grain structure(AGS) was investigated by optical microscope, scanning electron microscope, transmission ...
Peng Lan, Huasong Liu
doaj   +1 more source

Hierarchical Ordering Induced Ultrahigh Cryogenic Strength and Strain Hardening in a Ni2CoFeV Medium‐Entropy Alloy

Advanced Science, EarlyView.
A tri‐phase Ni2CoFeV medium‐entropy alloy with fcc, κ, and L12 phases achieves exceptional cryogenic strength‐ductility synergy at 77 K. It delivers a yield strength of 1.4 GPa, an ultimate tensile strength of 2.07 GPa and a tensile ductility of 28%.
Lei Gu, Wei Jiang, Qingzhong Mao, Xiang Chen, Yonghao Zhao   +4 more
wiley   +1 more source

Structurally Complex Precipitates Enhance Strength‐Ductility Synergy in a Duplex Medium Entropy Alloy

Advanced Science, EarlyView.
Strong‐yet‐ductile precipitation‐hardening alloys require novel microstructural complexity of precipitates in particularly at cryogenic condition, to constantly impart strain hardening of hard‐and‐brittle precipitates. The present work creates innovative structurally complex precipitates assembled with dispersed nanocores and a chemical‐heterogeneity ...
Shaohua Gao, Yang Yang, Xiaoxuan Fan, Jinyu Zhang, Shuaiyang Liu, Jiao Li, Hui Wang, Wenli Song, Gang Liu, Jun Sun   +9 more
wiley   +1 more source

Heat treatment technology for improving wear resistance of high‑precision die tools

Литьë и металлургия
A heat treatment process involving hardening with intermediate tempering has been developed to enhance the wear resistance of high‑precision die tools by 1.5–2 times compared to standard heat treatments.
D. M. Berdiev
doaj   +1 more source

Effect of Nb and V on Austenite Grain Growth Behavior of the Cr-Mo-V Steel for Brake Discs

High Temperature Materials and Processes, 2018
In order to improve the performance of the steel for brake discs, including strength, toughness and thermal fatigue resistance, Nb and V are added to the steel.
Dan Wu, Fuming Wang, Jin Cheng, Changrong Li   +3 more
semanticscholar   +1 more source

Hierarchical Twin Networks Enable Exceptional Strength and Fracture Toughness in Titanium

Advanced Science, EarlyView.
A commercial‐purity titanium with hierarchical ultrafine twin structures delivers an exceptional combination of fracture toughness (KJIc) of 187 MPa·m1/2 and specific yield strength of 140 MPa·cm3·g−1, in which pre‐engineered high‐density twin boundaries stimulate massive and dislocations to blunt crack tip.
Xiao‐Wei Zou, Ting Zhu, En Ma, Wei‐Zhong Han   +3 more
wiley   +1 more source

Model of Austenite Grain Growth during a Continuous Heating Process of Steel 42CrMo for Bearing Ring of Shield Tunneling Machine

Teshugang, 2014
Based on the model of isothermal austenite grain growth of steel 42CrMo for bearing ring of shield tunneling machine, the model of austenite grain growth during continuous heating process of steel has been established by using the principle of additivity.
郑禹, 姜培扬, 张豪臻, 周乐育, 张朝磊, 刘雅政   +5 more
doaj  

The Influence of Mg-Based Inclusions on the Grain Boundary Mobility of Austenite in SS400 Steel

Metals, 2019
In this study, the effects of the addition of Mg to the grain growth of austenite and the magnesium-based inclusions to mobility were investigated in SS400 steel at high temperatures.
Chih-Ting Lai, Hsuan-Hao Lai, Yen-Hao Frank Su, Fei-Ya Huang, Chi-Kang Lin, Jui-Chao Kuo, Hwa-Teng Lee   +6 more
doaj   +1 more source