Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
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In Situ Observation of the Zr Poisoning Effect in Al Alloys Inoculated by Al-Ti-B
Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science - Tập 49 - Trang 4771-4784 - 2018
In situ synchrotron X-ray radiography observations of the Zr-poisoning phenomenon of an Al-20 wt pct Zn alloy inoculated by Al-5Ti-1B were carried out. The effects of Zr addition on heterogeneous nucleation, grain growth, and final grain size were quantitatively studied and further analyzed using the interdependence model. The experimental results show that the undercooling needed for nucleation i......
Compressive strength and creep properties of Ir-Nb-Zr alloys between 1473 and 2073 K
Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science - Tập 34 - Trang 2207-2215 - 2003
The microstructure and strength at 1473 and 2073 K and creep properties at 2073 K were investigated in three Ir-Nb-Zr alloys with the fcc and L12 two-phase structure. The microstructure and lattice misfit were investigated using scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray diffractometry (XRD). Compression and creep tests were performed, and their deformati......
Considering particle morphology in a constitutive model for metal powders compaction
Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science - - 1999
Determination of thermophysical properties and boundary conditions of direct chill-cast aluminum alloys using inverse methods
Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science - Tập 31 - Trang 1627-1634 - 2000
In order to quantify the cooling conditions undergone by an ingot during direct-chill (DC) casting, thermocouples were immersed in the liquid pool and consequently entrapped in the solid, thus monitoring the temperature of the metal during its descent. Assuming steady-state thermal conditions, the time-dependent temperatures measured by these thermocouples were then converted into spacedependent t......
The Effect of Nb Addition on the Microstructure and the High-Temperature Strength of Fe3Al Aluminide
Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science - Tập 49 - Trang 1598-1603 - 2018
The microstructural and high-temperature mechanical properties of Fe–26Al–xNb (x = 3 and 5 at. pct) are compared. The alloys were investigated “as cast” and after hot rolling at 1473 K (1200 °C). Scanning electron microscopes equipped with EDS and EBSD were used for the microstructure and phase identification. The addition of 3 at. pct of Nb into the Fe3Al matrix leads to the formation of C14 λ—La......
Creep deformation characteristics of tin and tin-based electronic solder alloys
Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science - Tập 36 - Trang 99-105 - 2005
Creep deformation characteristics of pure tin, and Sn-3.5Ag and Sn-5Sb electronic solder alloys, have been studied at various temperatures between ambient and 473 K (homologous temperature 0.58 to 0.85). Power-law relationships between strain rate and stress were observed at most of the temperatures. The stress exponent (n=7.6, 5.0, and 5.0) and activation energy (Q
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Investigation of the Microstructural, Mechanical and Corrosion Properties of Grade A Ship Steel-Duplex Stainless Steel Composites Produced via Explosive Welding
Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science - Tập 48 Số 8 - Trang 3721-3733 - 2017
Five-Parameter Grain Boundary Inclination Recovery with EBSD and Interaction Volume Models
Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science - Tập 45 - Trang 4165-4172 - 2014
While electron backscatter diffraction (EBSD) patterns are often used to present two-dimensional information about a material microstructure, they are in fact a product of the three-dimensional electron interaction volume. Consequently, 3D spatial information exists in EBSD images, which is generally not accessed. Specifically, the inclination of the grain boundary plane may be observed in EBSD pa......
Effect of Stress Level on the High Temperature Deformation and Fracture Mechanisms of Ti-45Al-2Nb-2Mn-0.8 vol. pct TiB2: An In Situ Experimental Study
Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science - Tập 44 - Trang 1887-1896 - 2012
The effect of the applied stress on the deformation and crack nucleation and propagation mechanisms of a γ-TiAl intermetallic alloy (Ti-45Al-2Nb-2Mn (at. pct)-0.8 vol. pct TiB2) was examined by means of in situ tensile (constant strain rate) and tensile-creep (constant load) experiments performed at 973 K (700 °C) using a scanning electron microscope. Colony boundary cracking developed during the ......
Đặc trưng Hành Vi Lão Hóa Trong Thép Maraging Cấp M250 Sử Dụng Đo Đạc Siêu Âm Dịch bởi AI
Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science - Tập 38 Số 2 - Trang 236-243 - 2007
Các phép đo siêu âm đã được thực hiện trên các mẫu thép maraging cấp M250 trải qua quá trình ủ dung dịch ở nhiệt độ 1093 K trong 1 giờ, sau đó là lão hóa ở 755 K trong khoảng thời gian từ 0.25 đến 100 giờ. Ảnh hưởng của quá trình lão hóa đến cấu trúc vi mô, độ cứng ở nhiệt độ phòng và các tham số siêu âm (tốc độ sóng dọc và sóng cắt, và tỷ số Poisson) đã được nghiên cứu nhằm phát triển các mối tươ......
#Thép maraging #lão hóa #đo đạc siêu âm #tỷ số Poisson #tốc độ sóng dọc #tốc độ sóng cắt
Tổng số: 8,884
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