isothermal aging
Microstructural Evolution during Isothermal Aging in Ni Rich Ti Zr Ni Shape Memory Alloys
... during isothermal aging at temperatures ranging from 673 K to 773 K was investigated by transmission electron microscopy (TEM) for Ni-rich Ti-Zr-Ni ...the aging is a two-stage process: the first stage ...
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Isothermal Aging Behavior of Beta Titanium–Manganese Alloys
... with isothermal aging at 773 K for the (a) ...with isothermal aging at 773 K in the ...of isothermal omega were observed at ...to isothermal omega precipitation, which was ...
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Effect of Isothermal Aging on Ball Shear Strength in BGA Joints with Sn 3 5Ag 0 75Cu Solder
... of aging at 150 ◦ C com- pared to the strengths measured after as-soldered for Cu pad, electroless Ni–P/Cu pad and immersion Au/Ni–P/Cu ...After aging at 150 ◦ C for 100 days, the shear strength changed to ...
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Phase Decomposition in a Mechanically Alloyed Cu 44 5 at%Ni 22 5 at%Fe Alloy during Isothermal Aging
... The XRD pattern of the MA alloy powders, after isothermal aging at 1003 K for 1.8 ks is shown in Fig. 1(c). The XRD peaks located at high angle 2 showed clearly the peaks corresponding to the Cu-rich and ...
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A Quantitative Study of Precipitation of Metastable Phases in an Al 1 94 at%Cu Alloy during Isothermal Aging at 373 K
... Precipitation behavior of metastable phases in an Al-1.94 at%Cu alloy during isothermal aging at 373 K was investigated by means of Vickers microhardness tests, DSC measurements and TEM observations. The ...
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Spinodal Decomposition in an Fe 32 at%Cr Alloy during Isothermal Aging
... during aging of an Fe-32 at%Cr alloy by means of TEM, hardness and the numerical solution of the linear Cahn-Hilliard differential partial equation using the explicit finite difference ...the isothermal ...
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Intermetallic evolution for isothermal aging up to 2000Hours on Sn 4Ag 0 5Cu and Sn 37Pb solders with Ni/Au layers
... the reduction in surface-free energy. Scallop like morphology (lots of peaks and valleys) intermetallics had larger surface area than a planar layer of similar thickness, resulting in a large driving force for surface ...
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The Effect of Long Term Isothermal Aging on Dynamic Fracture Toughness of Type 17 4 PH SS at 350°C
... Scanning electron micrographs (SEM) shown in Figs. 8– 10 support the observations made from measurement of energy absorbed during impact as a function of aging time. The figures display the change of fracture ...
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Low Temperature Non Isothermal Aging of Nitrocellulose pdf
... Slow multi-sample thermal ramp aging experiments were performed on high viscosity lacquer grade nitrocellulose over the temperature range 30 – 80 8C. Nitrocellulose was used in the fibrous state, in solution and ...
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Low Temperature and Low Pressure Cu–Cu Bonding by Highly Sinterable Cu Nanoparticle Paste
... the isothermal aging test, the shear strength of the Cu–Cu joint shows a slight change, rising to ...the isothermal aging test, as illustrated in ...after aging test rep- resent the ...
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Effect of nickel doping on interfacial reaction between lead free solder and Ni P substrate
... Summary During reflow soldering and isothermal aging, Ni-doped solder SACN30505 represents a thicker IMC compared to SAC305 solder.. Only Cu, NioSns IMC was found at the interface after [r] ...
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Phase Transformation of α'' Martensite Structure by Aging in Ti 8 mass%Mo Alloy
... martensite to the and phases, was observed in DSC curve Fig. 2(b), and it was hard to detect changes with slow reaction rate such as those realized by isothermal aging. On the other hand, exothermic peak ...
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Effect of High Pressure Torsion Process on Precipitation Behavior of α Phase in β Type Ti 15Mo Alloy
... Upon isothermal aging from 623 to 923 K, there is a similar trend in the hardness of STA samples and HPTA samples that the hardness increases first and then ...by aging at 723 ...high aging ...
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Precipitation in a Zr alloy studied by differential scanning calorimetry analysis and microstructural observation
... To find out reasons accounting for the exothermic reaction III, the microstructures of the specimen heated at 5C/min to 750C are noted (Fig. 6). Partial recrystallization of the as-quenched plate structures is ...
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Effects of Cu Addition on Behavior of Nanoclusters during Multi Step Aging in Al Mg Si Alloys
... natural aging during the preperation of the ...before isothermal aging at 170 C with the multi-step heat treatment, electrical resistivity is normalised by the electrical resistivity before ...
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Studies on Kinetics and Mechanism of Thermal Decomposition of Binary Mixture of Ferrous Oxalate and Copper Oxalate in the 1:3 Mole Ratio
... 18) and obey two dimensional 33 diffusion followed by three dimensional diffusion or Ginling Braunshtein equation. In both diffusion processes a solid product is formed between the reactants, so that progress is ...
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Three Isothermal Amplification Techniques for Rapid Identification of Cladophialophora carrionii, an Agent of Human Chromoblastomycosis
... three isothermal amplification methods (rolling-circle amplification [RCA], multiplex ligation-depen- dent probe amplification [MLPA], and loop-mediated isothermal amplification [LAMP]) for the detection of ...
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Cyclic thermomechanical testing of 316 stainless steel
... Both in phase (IP) and out of phase (OP) TMF tests were carried out between 400-600 o C, with the same mechanical loading as the isothermal test; maximum stress of 186MPa R-ratio of 0.1. The cycling rate was ...
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Isothermal and non isothermal crystallization kinetics of composites of poly(propylene) and MWCNTs
... 40 K/min. cooling rate was excluded from all calculations, the remaining data listed in Table 6. By applying the Ozawa model to the results obtained, a clear two-stage crystallization process is evident. However, the ...
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Kinetics of isothermal and non isothermal precipitation in an Al 6at%Si alloy
... Further, high silicon Al-Si alloys with a Si content in excess of ~5at% possess an excellent castability, and as a result this group of alloys is technologically important. The present study will enhance the ...
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