Measurement and Modeling of Second Phase Precipitation Kinetics in Zirconium Niobium Alloys

The development of simulation tools for bridging different scales are essential for understanding complex joining processes. For precipitation hardening, the Kampmann-Wagner numerical model (KWN) is an important method to account for non-isothermal second phase precipitation. This model allows to describe nucleation, growth and coarsening of precipitation hardened aluminum alloys based on a size distribution for every phase which produces precipitations. In particular, this work investigates the performance of a KWN model by [1-3] for Al-Mg-Si-alloys. The model is compared against experimental data from isothermal heat treatments taken partially from [2]. Additionally, the model is used for investigation of the precipitation kinetics for a laser beam welding process, illustrating the time-dependent development of the different parameters related to the precipitation kinetics and the resulting yield strength.

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Experimental method for determining mixed-phase precipitation kinetics from synthetic geothermal brine

Applied Geochemistry ◽

10.1016/j.apgeochem.2014.05.016 ◽

2014 ◽

Vol 47 ◽

pp. 74-84 ◽

Cited By ~ 3

Author(s):

Jonathan Banks ◽

Simona Regenspurg ◽

Harald Milsch

Keyword(s):

Experimental Method ◽

Mixed Phase ◽

Precipitation Kinetics ◽

Phase Precipitation ◽

Geothermal Brine

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Inhomogeneous Deformation in Thin Films

Advances in X-ray Analysis ◽

10.1154/s0376030800023053 ◽

1995 ◽

Vol 39 ◽

pp. 627-635

Author(s):

I. C. Noyan ◽

C. C. Goldsmith

Keyword(s):

Thin Films ◽

Residual Stresses ◽

Second Phase ◽

Thermal Coefficient ◽

Stress Distributions ◽

Stress Determination ◽

Phase Precipitation ◽

Reliable Operation ◽

X Ray ◽

Layer Thin Film

Residual stresses are a major factor in the reliable operation of multi-layer thin film structures. These stresses may form due to defect incorporation during deposition, recrystallization, second-phase precipitation, thermal coefficient of expansion (TCE) mismatch, etc., as well as local plastic flow, delamination or cracking. In the literature, residual stresses are usually assumed to be constant in the plane of the film. This assumption is sometimes implicitly made, as in the cases where only two psi-tilts are used in the stress determination with the sin2Ψ analysis.In this paper, we will review the possible causes of heterogeneous stress distributions in thin films and discuss their impact on x-ray stress determination techniques using some new data from W films.

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Influence of Tempering Temperature on the Second Phase Precipitation and Properties of X60 Pipeline Steel

Energy Materials 2014 ◽

10.1002/9781119027973.ch90 ◽

2015 ◽

pp. 737-742

Author(s):

Zailong Liu ◽

Yuxiu Bian ◽

Yanfeng Zhao

Keyword(s):

Pipeline Steel ◽

Second Phase ◽

Phase Precipitation ◽

Tempering Temperature

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The Study on the Precipitation and Mechanical Properties of Steel with Copper

Materials Science Forum ◽

10.4028/www.scientific.net/msf.654-656.66 ◽

2010 ◽

Vol 654-656 ◽

pp. 66-69 ◽

Cited By ~ 1

Author(s):

Chuang Li ◽

Xue Min Wang ◽

Xin Lai He ◽

Cheng Jia Shang ◽

Yu He

Keyword(s):

Mechanical Properties ◽

Electron Microscope ◽

Volume Fraction ◽

Optical Microscope ◽

Second Phase ◽

Phase Precipitation ◽

Precipitation Behavior ◽

Quenching Temperature ◽

Bearing Steels ◽

Transition Electron

The properties and precipitation behavior of Cu-bearing steels have been investigated. The optical microscope and transition electron microscope were employed to study the influence of interrupted cooling and quenching temperature on the precipitation behavior. Also, the properties of samples with different quench processes were tested. The results show that when the steel is interruptedly cooled and quenched from 650-700°C, with the quenching temperature increasing the volume fraction of martensite becomes larger and the hardness becomes higher. When the microstructure is ferrite the second-phase precipitates occurs and they are proved copper-rich particles. However there are no obvious precipitates in martensite. The copper-rich second phase forms by the way of inter-phase precipitation.

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