A Transforming Metal Nanocomposite with Large Elastic Strain, Low Modulus, and High Strength

Science ◽  
2013 ◽  
Vol 339 (6124) ◽  
pp. 1191-1194 ◽  
Author(s):  
S. Hao ◽  
L. Cui ◽  
D. Jiang ◽  
X. Han ◽  
Y. Ren ◽  
...  
1978 ◽  
Vol 57 (4) ◽  
pp. 563-569 ◽  
Author(s):  
A. Jon Goldberg ◽  
Robert G. Craig ◽  
Frank E. Filisko

A series of polyurethane elastomers based on an aliphatic diisocyanate and a polyether macroglycol was polymerized with various crosslink densities and OH/NCO ratios. Stoichiometries yielding between 8,600 and 12,900 gm/ mole/crosslink and an OH/NCO ratio of 1.1 resulted in polymers with the low modulus, yet high strength and elongation necessary for maxillofacial applications.


2014 ◽  
Vol 24 (2) ◽  
pp. 157-162 ◽  
Author(s):  
Qingkun Meng ◽  
Shun Guo ◽  
Qing Liu ◽  
Liang Hu ◽  
Xinqing Zhao

2020 ◽  
Vol 321 ◽  
pp. 05010
Author(s):  
J. Stráský ◽  
J. Kozlík ◽  
K. Bartha ◽  
D. Preisler ◽  
T. Chráska

Revived interest for beta Ti alloys with increased oxygen content is motivated by the prospect of achieving material with low modulus and high strength simultaneously. Fine tuning of amount of oxygen and beta stabilizing elements is critical for achieving good mechanical properties. This study shows that powder metallurgy method of spark plasma sintering is capable of producing Ti-Nb-Zr-O alloys from elemental powders. This simple approach allows for quick sampling and production of several alloys with various chemical composition. Elemental powders were mixed with appropriate amount of titanium dioxide to achieve Ti-29Nb-7Zr-0.7O alloy. Sintering was performed at 1400 - 1500 °C for 15 – 30 minutes.


Materialia ◽  
2020 ◽  
Vol 14 ◽  
pp. 100941 ◽  
Author(s):  
Raghunandan Ummethala ◽  
Phani S. Karamched ◽  
Sokkalingam Rathinavelu ◽  
Neera Singh ◽  
Akash Aggarwal ◽  
...  

Author(s):  
Ana Marques ◽  
Georgina Miranda ◽  
Diana Faria ◽  
Paulo Pinto ◽  
Filipe Silva ◽  
...  

2013 ◽  
Vol 747-748 ◽  
pp. 855-859
Author(s):  
Xiao Xue Chen ◽  
Shun Guo ◽  
Xin Qing Zhao

A series of Ti-Mo-Sn alloys with different Mo contents from 7% to 15% (wt. %) were prepared, and the effects of Mo content and thermo-mechanical treatment on their microstructural evolution and mechanical behavior were investigated. The experimental results indicated that the β to α martensite transformation can be effectively suppressed with increasing Mo content. After cold rolling treatment, superior mechanical properties and low modulus were achieved in Ti-8Mo-4Sn alloy, with tensile strength of 1108MPa, yield strength of 1003MPa and low Youngs modulus of 53GPa. The influence of severe cold deformation on the macrostructure and mechanical properties was discussed based on the characterization of X-Ray diffraction and mechanical tests. It was demonstrated that the cold rolling induced fine α martensite and high density dislocations lead to the high strength of the Ti-Mo-Sn alloys. The fine α martensite as well as the β matrix with low stability guarantee low Youngs modulus.


2015 ◽  
Vol 2 ◽  
pp. S545-S548 ◽  
Author(s):  
T. Yamaguchi ◽  
T. Fukuda ◽  
T. Kakeshita

1942 ◽  
Vol 15 (4) ◽  
pp. 790-797
Author(s):  
Elmer Latshaw

Abstract The elastic properties of vulcanized rubber present a difficult problem to generalize, mainly because of the large number of compounds in common use. There are good reasons for many kinds and grades, and a characteristic common to all is large elastic strain. Even in the best grades of rubber these strains are not perfectly elastic, but this is also true of almost all other materials, including spring steels. An elastic strain theory will be derived for a specific group of rubber compounds, namely, spring stocks. These are dense, strong rubbers, highly elastic within the working stress range, and capable of supporting loads under continuous vibration and shocks. To be of real value, the strain law should closely predict strain for the range of working stress, or more generally for the elastic range, and should indicate the trend at very high stresses where inelasticity becomes more prominent. Figure 1 shows a cylindrical element of rubber having an area A0 and length h when unstressed. If a uniform stress is imposed perpendicular to the end area, the length changes to H and the area to A. These symbols apply whether the stress is tension or compression. The usual definition of strain, i.e., change in length due to stress divided by the unstressed length, is comprehensive and descriptive for the large strains in rubber.


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