Simulations Indicate Aluminum Has a Higher Ideal Shear Strength than Copper
نویسندگان
چکیده
منابع مشابه
Ideal pure shear strength of aluminum and copper.
Although aluminum has a smaller modulus in [111]<112> shear than that of copper, we find by first-principles calculation that its ideal shear strength is larger because of a more extended deformation range before softening. This fundamental behavior, along with an abnormally high intrinsic stacking fault energy and a different orientation dependence on pressure hardening, are traced to the dire...
متن کاملIdeal shear strength of a quantum crystal.
Using path-integral Monte Carlo simulations, we compute the ideal shear strength (ISS) on the basal plane of hcp (4)He. The failure mode upon reaching the ISS limit is characterized by the homogeneous nucleation of a stacking fault and it is found to be anisotropic, consistent with Schmid's law of resolved shear stress. Comparing the ISS of hcp (4)He to a large set of classical crystals shows t...
متن کاملAb Initio Study of Ideal Shear Strength
Ideal strength, which can be defined as the stress necessary to induce permanent deformation in a material without prior imperfections, is one of the important materials characterizations. In this study we calculate the ideal pure shear and simple shear strengths of fcc (Al, Cu, Ni, Ag) and bcc (Fe, Mo, W) metals in their common slip systems using density functional theory. We find the critical...
متن کاملEndoscopic third ventriculostomy has no higher costs than ventriculoperitoneal shunt.
OBJECTIVE To evaluate the cost of endoscopic third ventriculostomy (ETV) compared to ventriculoperitoneal shunt (VPS) in the treatment of hydrocephalus in children. METHOD We studied 103 children with hydrocephalus, 52 of which were treated with ETV and 51 with VPS in a prospective cohort. Treatment costs were compared within the first year after surgery, including subsequent surgery or hospi...
متن کاملHigher copper concentrations in serum than in plasma.
CLIN. CHEM. 20/9, 1233-1234(1974) 3. Praetorius, E., and Paulsen, H., Enzymatic determination of uric acid with detailed directions. Scand. J. Clirz. Lab. Invest. 5, 273 (1953). 4. Feichtmeir, T. V., and Wrenn, H. T., Direct determination of uric acid using unease. Amer. J. Clin. Pathol. 25,833 (1955). 5. Liddle, L., Seegniiller, J. E., and Laster, L., The enzymatic spectrophotometric method fo...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: MRS Bulletin
سال: 2003
ISSN: 0883-7694,1938-1425
DOI: 10.1557/mrs2003.6