A Novel Constraint Method During Solution Treatment to Suppress Heating Rate-Dependent Martensitic Stabilization in Cu-17.0Al-10.5Mn Alloy

2018 ◽  
Vol 20 (7) ◽  
pp. 1701082 ◽  
Author(s):  
Qin Yang ◽  
Jie Chen ◽  
Yutang Meng ◽  
Jiqiang Ge ◽  
Shanling Wang ◽  
...  
Keyword(s):  
Heating Rate ◽  
Solution Treatment ◽  
Rate Dependent ◽  
Constraint Method

Heating rate dependent delamination of metal–polymer interfaces: experiments and modeling

2014 ◽  
Vol 187 (2) ◽  
pp. 227-238
Author(s):  
Siow Ling Ho ◽  
Shailendra P. Joshi ◽  
Andrew A. O. Tay
Keyword(s):  
Heating Rate ◽  
Polymer Interfaces ◽  
Rate Dependent ◽  
Metal Polymer

Investigation of defect levels in Bi12SiO20 single crystals by thermally stimulated current measurements

2021 ◽  
Author(s):  
Mehmet Isik ◽  
Serdar Delice ◽  
Nizami M Gasanly
Keyword(s):  
Heating Rate ◽  
Czochralski Method ◽  
Intrinsic Defect ◽  
Heating Rates ◽  
Thermally Stimulated Current ◽  
Rate Dependent ◽  
Defect Centers ◽  
Curve Fit ◽  
Maximum Temperatures ◽  
Kinetics Of

Abstract Bi12SiO20 (BSO) single crystal belongs to the sillenite semiconducting family known as defective compounds. The present paper investigates the defect centers in BSO grown by Czochralski method by means of thermally stimulated current (TSC) measurements performed in the 10-260 K range. The TSC glow curve obtained at heating rate of β = 0.1 K/s presented several peaks associated with intrinsic defect centers. The activation energies of defect centers were revealed as 0.09, 0.15, 0.18, 0.22, 0.34, 0.70 and 0.82 eV accomplishing the curve fit analyses method. The peak maximum temperatures and orders of kinetics of each deconvoluted peak were also determined as an outcome of fitting process. TSC experiments were expanded by making the measurements at various heating rates between 0.1 and 0.3 K/s to get information about the heating rate dependent peak parameters.

Heating Rate-Dependent Dehydrogenation in the Thermal Decomposition Process of Mg(BH4)2·6NH3

2013 ◽  
Vol 117 (32) ◽  
pp. 16326-16335 ◽  
Author(s):  
Yanjing Yang ◽  
Yongfeng Liu ◽  
You Li ◽  
Mingxia Gao ◽  
Hongge Pan
Keyword(s):  
Thermal Decomposition ◽  
Heating Rate ◽  
Decomposition Process ◽  
Thermal Decomposition Process ◽  
Rate Dependent

Heating-rate dependent internal friction background in aluminium

1985 ◽  
Vol 92 (2) ◽  
pp. K109-K112 ◽  
Author(s):  
S. Kiss ◽  
R. Schaller ◽  
W. Benoit
Keyword(s):  
Internal Friction ◽  
Heating Rate ◽  
Rate Dependent

Effects of heating rate during solid-solution treatment on microstructure and fatigue properties of AA2524 T3 Al–Cu–Mg sheet

2016 ◽  
Vol 104 ◽  
pp. 116-125 ◽  
Author(s):  
Fanghua Shen ◽  
Bin Wang ◽  
Danqing Yi ◽  
Huiqun Liu ◽  
Cong Tang ◽  
...  
Keyword(s):  
Solid Solution ◽  
Heating Rate ◽  
Solution Treatment ◽  
Fatigue Properties ◽  
Solid Solution Treatment

Numerical model for the fire protection performance and the design of intumescent coatings on structural steel exposed to natural fires

2019 ◽  
Vol 11 (1) ◽  
pp. 33-50 ◽  
Author(s):  
Waldemar Weisheim ◽  
Peter Schaumann ◽  
Lisa Sander ◽  
Jochen Zehfuß
Keyword(s):  
Numerical Model ◽  
Heating Rate ◽  
Fire Protection ◽  
Material Properties ◽  
Large Scale ◽  
Material Model ◽  
Small Scale ◽  
Content Type ◽  
Natural Fires ◽  
Rate Dependent

Purpose This paper aims to deal with the experimental and numerical investigations of the fire protection performance of a waterborne intumescent coating (IC) on structural steel in case of natural fires. Based on own small-scale laboratory tests, an advanced numerical model is developed to simulate the fire protection performance of the investigated coating in case of arbitrary fire scenarios. The insulation efficiency of the coating is described within the model by temperature and heating rate-dependent material properties, such as expansion factors, thermal conductivity and heat capacity. The results of the numerical model are compared to own large-scale fire tests of an unloaded I-section beam and column. Design/methodology/approach As natural fires can show arbitrary regimes, the material properties of the waterborne IC are investigated for various heating rates. Based on these investigations, a material model for the IC is implemented in the finite element program ABAQUS. With the help of user subroutines, the material properties of the coating are introduced for both the heating and cooling phase of natural fires, allowing for two- and three-dimensional thermomechanical analyses of coated steel elements. Findings The results of the performed small-scale laboratory tests show a heating rate-dependent behavior of the investigated coating. The mass loss as well as the expansion of the coating change with the heating rate. Moreover, the material properties obtained on small scale are valid for large scale. Therefore, a material model could be developed that is suitable to reproduce the results of the large-scale fire tests. Additionally, with the help of the numerical model, a dimensioning approach for the dry film thickness (DFT) of the investigated coating is derived for arbitrary natural fires. Research limitations/implications The material properties presented in this paper are only valid for the investigated waterborne IC and the parameter area that was chosen. However, the developed modeling approach for the fire protection performance of ICs is general and can be applied for every coating that is part of the intumescent product family. Originality/value Until now, only few research works have been carried out on the fire protection performance of ICs under non-standard fire exposure. This paper deals extensively with the material properties and the material modeling of a waterborne IC exposed to natural fires. Especially, the laboratory examinations and the numerical simulations are unique and allow for new evaluation possibilities of ICs.

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