scholarly journals STUDIES ON PROPERTY CHANGES IN TIRE CORDS INDUCED BY HEAT TREATMENT

1971 ◽  
Vol 44 (9) ◽  
pp. 758-763
Author(s):  
S. Fukuhara ◽  
Y. Suzuki ◽  
S. Omote ◽  
K. Amada
Keyword(s):  
Heat Treatment ◽  
Property Changes

scholarly journals STUDIES ON PROPERTY CHANGES OF TIRE CORDS INDUED BY HEAT TREATMENT

1971 ◽  
Vol 44 (9) ◽  
pp. 764-768
Author(s):  
S. Fukuhara ◽  
Y. Suzuki ◽  
S. Omote ◽  
K. Amada
Keyword(s):  
Heat Treatment ◽  
Property Changes

Magnetic Hardening of Mechanichally Alloyed SmFe11−xCoxTi

1999 ◽  
Vol 581 ◽  
Author(s):  
L. Bessais ◽  
C. Djega-Mariadassou
Keyword(s):  
Heat Treatment ◽  
Rietveld Method ◽  
Hexagonal Phase ◽  
X Ray Diffraction ◽  
Major Phase ◽  
X Ray ◽  
Different Temperatures ◽  
Magnetic Hardening ◽  
Property Changes ◽  
Nanocrystalline Phases

ABSTRACTMechanical alloying of ternary SmFe11−xCoxTi (x = 0, 0.5, 1, 1.5, 2) alloys was carried out under an Ar atmosphere. Milled samples were annealed for 30 min in a vacuum at different temperatures Ta from 650 °C to 1150 °C. The effects of heat treatment, on structure and magnetic property changes, have been investigated by means of x-ray diffraction using the Rietveld method, Mössbauer spectroscopy and differential sample magnetometer. Tetragonal ThMn12-type structure is observed for samples annealed at Ta > 900 °C. For 650<Ta<800 °C the TbCu7 type phase was identified as the major phase. Between these two regions a mixture of TbCu7 and ThMn12-type nanocrystalline phases is obtained with a maximum of the coercive field Hc (Hc > 5kOe). The Mössbauer spectra relative to the hexagonal phase show sextuplets broadened by the statistical occupancies of the iron sites. An enhancement of the magnetic properties results from the Co substitution.

MICROSTRUCTURE AND FUNCTIONAL PROPERTY CHANGES IN THIN Ni–Ti WIRES HEAT TREATED BY ELECTRIC CURRENT — HIGH ENERGY X-RAY AND TEM INVESTIGATIONS

2009 ◽  
Vol 02 (02) ◽  
pp. 45-54 ◽  
Author(s):  
B. MALARD ◽  
J. PILCH ◽  
P. SITTNER ◽  
V. GARTNEROVA ◽  
R. DELVILLE ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Electric Current ◽  
High Energy ◽  
X Ray ◽  
Transmission Electron ◽  
Conventional Heat Treatment ◽  
Wide Range ◽  
Millisecond Range ◽  
Property Changes ◽  
Evolution Of Microstructure

High energy synchrotron X-ray diffraction, transmission electron microscopy and mechanical testing were employed to investigate the evolution of microstructure, texture and functional superelastic properties of 0.1 mm thin as drawn Ni – Ti wires subjected to a nonconventional heat treatment by controlled electric current (FTMT-EC method). As drawn Ni – Ti wires were prestrained in tension and exposed to a sequence of short DC power pulses in the millisecond range. The annealing time in the FTMT-EC processing can be very short but the temperature and force could be very high compared to the conventional heat treatment of SMAs. It is shown that the heavily strained, partially amorphous microstructure of the as drawn Ni – Ti wire transforms under the effect of the DC pulse and tensile stress into a wide range of annealed nanosized microstructures depending on the pulse time. The functional superelastic properties and microstructures of the FTMT-EC treated Ni – Ti wire are comparable to those observed in straight annealed wires.

Effect of PWHT on the Mechanical Properties of P5 Steel Welded Joints

2010 ◽  
Vol 165 ◽  
pp. 104-109 ◽  
Author(s):  
Vigantas Kumšlytis ◽  
Algirdas Vaclovas Valiulis ◽  
Olegas Černašejus
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Welded Joints ◽  
Operational Reliability ◽  
Heat Treated ◽  
Molybdenum Steel ◽  
Key Issues ◽  
Optimum Heat ◽  
Property Changes ◽  
The Impact

Presented work analyses the impact of heat treatment parameters on the mechanical properties and operational reliability of P5 (5%Cr0.5%Mo) steel welded joints. The key objects of research are heat-treated chrome-molybdenum steel welded joints and piping elements operated at high temperature for an extensive period of time, where degradation of mechanical properties has been observed. The main objective is to investigate the causes of degradation of alloy steel mechanical properties during fabrication and operation of the equipment, and to develop a methodology for identification of optimum heat treatment parameters for chrome-molybdenum steel welded joints. A few key issues are addressed herein: identification of dependence of chrome-molybdenum (5%Cr-0.5%Mo) steel welded joint mechanical properties on heat treatment parameters, identification of the optimum value of temperature/time parameter, and identification of causes of mechanical property changes and degradation of the steel.

Microstructure and Property Changes of Poly ( Ethylene Terephthalate) Fiber with Moderate Tenacity during Heat Treatment under Constant-Length Conditions

2011 ◽  
Vol 332-334 ◽  
pp. 313-316 ◽  
Author(s):  
Xiao Wang ◽  
Feng Tian ◽  
Yu Mei Zhang ◽  
Shi Yan Chen
Keyword(s):  
Heat Treatment ◽  
Ethylene Terephthalate ◽  
Mechanical Analysis ◽  
Treatment Temperature ◽  
Constant Length ◽  
X Ray ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene ◽  
The Stability ◽  
Property Changes

In this paper, Wide Angle X-ray Diffraction (WAXD), Small Angle X-ray Scattering (SAXS), Dynamic Mechanical Analysis (DMA) and mechanical testing were employed to characterize the effect of heat treatment under constrained condition on poly(ethylene terephthalate) (PET) fiber. The microstructure and property of the PET fiber with moderate tenacity changed with the heat treatment temperature from 110 °C to 190 °C. No change happened in the crystalline phase while the micro-crystal formed in the amorphous phase from the result of crystalline parameters, which led to the increase of Tg of the fiber. The decrease of the tenacity is due to the decrease of the amorphous orientation and the decrease of the long period leads to the increase of the stability of the fiber.

Structural and property changes in glass-like carbons formed by heat treatment and addition of filler

2004 ◽  
Vol 12 (4) ◽  
pp. 399-406 ◽  
Author(s):  
Jangsoon Kim ◽  
Myung-Soo Kim ◽  
Hyun-Sik Hahm ◽  
Yun-Soo Lim
Keyword(s):  
Heat Treatment ◽  
Property Changes
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