In situ synchrotron tomographic investigation of the solidification of an AlMg4.7Si8 alloy [0.03%]
原位铝镁合金铸件凝固过程的实时光子计算机层析成像研究(英文)
D Tolnai,P Townsend,G Requena et al.
D Tolnai et al.
The solidification sequence of an AlMg4.7Si8 alloy is imaged in situ by synchrotron microtomography. Tomograms with (1.4 μm)3/voxel have been recorded every minute while cooling the melt from 600 °C at a cooling rate of 5 K min-1 to 540 ...
Nicholas Stephanopoulos,Julia H Ortony,Samuel I Stupp
Nicholas Stephanopoulos
The use of self-assembly for the construction of functional biomaterials is a highly promising and exciting area of research, with great potential for the treatment of injury or disease. By using multiple noncovalent interactions, coded int...
The formation of supersaturated solid solutions in Fe-Cu alloys deformed by high-pressure torsion [0.03%]
高压扭转变形下Fe-Cu合金中超饱和固溶体的形成
A Bachmaier,M Kerber,D Setman et al.
A Bachmaier et al.
Fully dense bulk nanocomposites have been obtained by a novel two-step severe plastic deformation process in the immiscible Fe-Cu system. Elemental micrometer-sized Cu and Fe powders were first mixed in different compositions and subsequent...
Influence of impurities and deformation temperature on the saturation microstructure and ductility of HPT-deformed nickel [0.03%]
杂质和变形温度对HPT变形镍的饱和组织与塑性的影响
Georg B Rathmayr,Reinhard Pippan
Georg B Rathmayr
Ni with different purities between 99.69 and 99.99 wt.% was deformed by high-pressure torsion (HPT) to high strains, where no further refinement of the microstructure is observed. The HPT deformation temperature varied between -196 and 400 ...
Three-dimensional rigid multiphase networks providing high-temperature strength to cast AlSi10Cu5Ni1-2 piston alloys [0.03%]
三维强化 rigiden 多相网状组织使 AlSi10Cu5Ni1-2 铸造活塞合金获得高温强度
Z Asghar,G Requena,E Boller
Z Asghar
The three-dimensional (3-D) architecture of rigid multiphase networks present in AlSi10Cu5Ni1 and AlSi10Cu5Ni2 piston alloys in as-cast condition and after 4 h spheroidization treatment is characterized by synchrotron tomography in terms of...
Structural modifications during heating of bulk nanocrystalline FeAl produced by high-pressure torsion [0.03%]
高压扭转制备的纳米晶FeAl在加热过程中的结构演变
C Mangler,C Gammer,H P Karnthaler et al.
C Mangler et al.
The deformation-induced nanostructure developed during high-pressure torsion of B2 long-range ordered FeAl is shown to be unstable upon heating. The structural changes were analyzed using transmission electron microscopy, differential scann...
Polarization Fatigue in Pb(In(0.5)Nb(0.5))O(3)-Pb(Mg(1/3)Nb(2/3))O(3)-PbTiO(3) Single Crystals [0.03%]
Pb(In(0.5)Nb(0.5))O(3)-Pb(Mg(1/3)Nb(2/3))O(3)-PbTiO(3)单晶的铁电疲劳性质研究
Shujun Zhang,Jun Luo,Fei Li et al.
Shujun Zhang et al.
Electric fatigue tests have been conducted on pure and manganese modified Pb(In(0.5)Nb(0.5))O(3)-Pb(Mg(1/3)Nb(2/3))O(3)-PbTiO(3) (PIN-PMN-PT) single crystals along different crystallographic directions. Polarization degradation was observed...
Yu Zhang,Li Ma
Yu Zhang
We present a new concept for strengthening ceamics by utilizing a graded structure with a low elastic modulus at both top and bottom surfaces sandwiching a high-modulus interior. Closed-form equations have been developed for stress analysis...
Design maps for failure of all-ceramic layer structures in concentrated cyclic loading [0.03%]
集中循环加载下全瓷层结构失效的设计地图
Sanjit Bhowmick,Juan José Meléndez-Martínez,Yu Zhang et al.
Sanjit Bhowmick et al.
A study is made of the competition between failure modes in ceramic-based bilayer structures joined to polymer-based substrates, in simulation of dental crown-like structures with a functional but weak "veneer" layer bonded onto a strong "c...
F W Zok,A Miserez
F W Zok
Using mechanics models of contacting surfaces under both normal and tangential loads, a mechanistic framework has been developed for assessing material resistance to initiation of abrasive damage. Solutions are presented for the critical lo...