scholarly journals Metallocene copolymers of propene and 1-hexene: The influence of the comonomer content and thermal history on the structure and mechanical properties

2006 ◽  
Vol 44 (8) ◽  
pp. 1253-1267 ◽  
Author(s):  
J. M. López-Majada ◽  
H. Palza ◽  
J. L. Guevara ◽  
R. Quijada ◽  
M. C. Martínez ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Thermal History ◽  
Comonomer Content

Measurement and interpretation of stress in copper films as a function of thermal history

1991 ◽  
Vol 6 (7) ◽  
pp. 1498-1501 ◽  
Author(s):  
Paul A. Flinn
Keyword(s):  
Mechanical Properties ◽  
Thermal Expansion ◽  
Elastic Modulus ◽  
Thermal History ◽  
Copper Films ◽  
Thermally Induced ◽  
Aluminum Films ◽  
Interconnection Material ◽  
Interconnect Systems

Since copper has some advantages relative to aluminum as an interconnection material, it is appropriate to investigate its mechanical properties in order to be prepared in advance for possible problems, such as the cracks and voids that have plagued aluminum interconnect systems. A model previously used to interpret the behavior of aluminum films proves to be, with minor modification, also applicable to copper. Although the thermal expansion of copper is closer to that of silicon and, consequently, the thermally induced strains are smaller, the much larger elastic modulus of copper results in substantially higher stresses. This has implications for the interaction of copper lines with dielectrics.

Improvement of Solution Type Plasma Spraying Process

2005 ◽  
Vol 502 ◽  
pp. 505-510 ◽  
Author(s):  
Masami Futamata ◽  
Xiaohui Gai ◽  
Toyokazu Mizumoto ◽  
Kimio Nakanishi
Keyword(s):  
Mechanical Properties ◽  
Plasma Spraying ◽  
Hollow Cathode ◽  
Thermal History ◽  
Thermal Spraying ◽  
Physical And Mechanical Properties ◽  
Good Reproducibility ◽  
Solution Type ◽  
Plasma Spraying Process ◽  
Spraying Process

To fabricate thermal spraying coatings with good reproducibility, it is necessary to improve the process of the equalization of both thermal history and impacting behavior of the particles. In this study, the characteristics of the solution type plasma spraying using the hollow-cathode type torch are investigated. The physical and mechanical properties that are different from usual thermal spraying coatings are described. By using solutions including metal ingredients in a state of ion, colloid or sol, thinner coating that cannot be made by conventional plasma spraying methods is formed on various substrates. The coatings are uniform in appearance.

Influence of thermal history on the mechanical properties of thermotropic poly(triethylene glycol p,p?-bibenzoate)

1995 ◽  
Vol 34 (5-6) ◽  
pp. 635-641 ◽  
Author(s):  
R. Benavente ◽  
J. M. Pere�a ◽  
A. Bello ◽  
E. P�rez
Keyword(s):  
Mechanical Properties ◽  
Thermal History ◽  
Triethylene Glycol

Assessment of Microstructure and Mechanical Properties in Laser Cladding, Welding and Surface Polishing Through Online Monitoring of Thermal History

2019 ◽  
Author(s):  
Ashish Kumar Nath ◽  
Muvvala Gopinath
Keyword(s):  
Mechanical Properties ◽  
Laser Cladding ◽  
Thermal History ◽  
Thermal Stresses ◽  
Ceramic Coating ◽  
Online Monitoring ◽  
Laser Polishing ◽  
Melt Pool ◽  
On Line ◽  
Repeatability And Reproducibility

Abstract Monitoring and controlling the microstructure, phases, and thermal stresses in laser cladding of materials which determine their mechanical properties is essential for ensuring repeatability and reproducibility in refurbishing engineering parts and building functional parts by layer-by-layer deposition in additive manufacturing process. Several studies have been reported on on-line monitoring of temperature, melt-pool geometry, and porosity etc. in laser powder deposition process, but only a few on the assessment of solidification morphology, microstructure, and thermal stresses. Since these features are dictated by the melt-pool lifetime, cooling and solidification rates, their effects on the evolution of microstructure and the state of ceramic particles in laser deposition of Ni-super alloy and metal matrix composites of WC and TiC are investigated in the current study. Good correlation exists between the thermal history monitored online and the solidification characteristics. Process maps based on the melt-pool lifetime as a function of laser cladding parameters for these materials are developed. On-line monitoring of thermal cycle is extended to laser welding of stainless steel and titanium which are difficult to join together due to the formation of brittle intermetallic phases, and laser polishing of thermal sprayed ceramic coating to develop a better understanding and control of these processes. Melt-pool lifetime is found to have significant effect on the crack growth in fusion welding and by optimizing the former the later could be mitigated. Similarly, the cooling rate in laser polishing of thermal sprayed ceramic coating is found to have significant influence on the surface roughness and residual stress. These studies show that the online monitoring of thermal history can be exploited for controlling the process quality and ensuring the repeatability and reproducibility in different laser material processing modalities.

Influence of the thermal history on the mechanical properties of two alumina based castables

2009 ◽  
Vol 29 (15) ◽  
pp. 3197-3204 ◽  
Author(s):  
M. Ghassemi Kakroudi ◽  
E. Yeugo-Fogaing ◽  
M. Huger ◽  
C. Gault ◽  
T. Chotard
Keyword(s):  
Mechanical Properties ◽  
Thermal History

Effect of process parameters on thermal history and mechanical properties of friction stir welds

2009 ◽  
Vol 30 (7) ◽  
pp. 2726-2731 ◽  
Author(s):  
N. Rajamanickam ◽  
V. Balusamy ◽  
G. Madhusudhanna Reddy ◽  
K. Natarajan
Keyword(s):  
Mechanical Properties ◽  
Process Parameters ◽  
Thermal History ◽  
Friction Stir

Effect of Heating Rate on Al Bonding in Air by Inserted A5056 Disk

2007 ◽  
Vol 345-346 ◽  
pp. 1457-1460 ◽  
Author(s):  
Hiroshi Kawakami ◽  
Keiko Kimura ◽  
Satoshi Kondo ◽  
Jippei Suzuki
Keyword(s):  
Mechanical Properties ◽  
Oxide Film ◽  
Heating Rate ◽  
Thermal History ◽  
Bonding Process ◽  
High Heating Rate ◽  
High Heating ◽  
History Of ◽  
Al Oxide ◽  
Bonding Surface

Al bonding in air by inserted A5056 was investigated in this study. Heating rate in thermal history of bonding process may have the relation with the growth of Al oxide film and the deformation of bonding surface by softening. Both of phenomena affect the joinability and the mechanical properties of bond. Al bonding in air was carried out by several heating rate. Growth of Al oxide film significantly suppressed the progress of bonding in air by low heating rate, 1K/s. Decrease of deformation of bonding surface suppressed also the progress of bonding by high heating rate, 10K/s. In case of medium heating rate, 5K/s, good joinabilty of Al bonding in air was obtained by the medium growth of oxide film and the deformation of bonding surface.

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