A Thermal Deformation Test Technique Robust to Change in Room Temperature Using Multiple Periodic Heating

2021 ◽  
Author(s):  
Takahiko Shibata ◽  
Kosei Ishimura ◽  
Tomoyuki Miyashita
Keyword(s):  
Thermal Deformation ◽  
Room Temperature ◽  
Periodic Heating ◽  
Test Technique ◽  
Deformation Test

A Thermal Deformation Test Method Robust to Changes in Room Temperature Using Periodic Heating

2020 ◽  
Vol 2020 (0) ◽  
pp. 16D08
Author(s):  
Kosei ISHIMURA ◽  
Kosei ISHIMURA ◽  
Tetsuhiro MIYAZAKI ◽  
Tomoyuki MIYASHITA
Keyword(s):  
Thermal Deformation ◽  
Room Temperature ◽  
Test Method ◽  
Periodic Heating ◽  
Deformation Test

Microstructual Analysis of Stress Relieving on the Thermal Deformation Behaviors of Titanium Tailor-Welded Blanks

2013 ◽  
Vol 677 ◽  
pp. 169-172
Author(s):  
Chi Ping Lai ◽  
Luen Chow Chan
Keyword(s):  
Heat Treatment ◽  
Thermal Deformation ◽  
Room Temperature ◽  
Cold Working ◽  
Working Temperature ◽  
Tailor Welded Blanks ◽  
Working Stress ◽  
Heating Device ◽  
Stress Relieving ◽  
Deformation Behaviors

This paper aims to investigate the microstructual analysis of titanium tailor-welded blanks (Ti-TWBs) undergoing the stress relieving (SR) during a thermal deformation. A modified HILLE machine, with a specific heating device that can adjust the working temperature, was employed in this study. Qualified Ti-TWBs specimens were prepared in different widths and lengths. In order to compare the performance of both SR and non-SR Ti-TWBs, the formability analyses at room temperature and around 550degC were then carried out accordingly. The limit dome heights (LDH) of these specimens were measured and it was found that the ductility of the SR Ti-TWBs was improved due to the removal of the hardening effect as well the working stress during the cold working. Moreover, the fracture surface of the Ti-TWBs also revealed that the microstructure was fine and equaxial after the heat treatment. It can be concluded that the microstructual evolution is useful to enhance the strength of Ti-TWBs.

Crystal Plasticity Analysis of Thermal Deformation and Dislocation Accumulation in ULSI Cells

2006 ◽  
Vol 324-325 ◽  
pp. 1035-1038 ◽  
Author(s):  
Michihiro Sato ◽  
Tetsuya Ohashi ◽  
Takuya Maruizumi ◽  
Isao Kitagawa
Keyword(s):  
Crystal Plasticity ◽  
Thermal Deformation ◽  
Room Temperature ◽  
Friction Stress ◽  
High Temperature Region ◽  
Shallow Trench Isolation ◽  
Trench Isolation ◽  
Half Loop ◽  
The Difference ◽  
Lattice Friction

Thermal stress, plastic slip deformation and accumulation of dislocations in shallow trench isolation (STI) type ULSI devices when the temperature drops from 1000 し to room temperature are analyzed by a crystal plasticity analysis cord. The results show that dislocation accumulation takes place at the temperature range over 800 し, and the difference of 6 MPa in the lattice friction stress at 1000 し!causes increase of dislocation density more than 1.6 times. Dislocations generate and accumulate at the shoulder part of the device area and bottom corners of the trench. Dislocations are categorized into two groups. In one group, dislocation lines are mostly straight and parallel to the trench direction, and in the other group, dislocations make half loop type structure. Possibilities for the suppression of dislocation accumulation through control of lattice friction stress at high temperature region are discussed.

scholarly journals Thermal Deformation Test and Modeling of Main Spindle of Numerical Control Vertical Machining Center

2020 ◽  
Vol 1583 ◽  
pp. 012005
Author(s):  
Qijun Xiao ◽  
Zhonghui Luo ◽  
Mei Luo ◽  
Shihsheng Liu ◽  
Weitai Hsu ◽  
...  
Keyword(s):  
Thermal Deformation ◽  
Numerical Control ◽  
Machining Center ◽  
Deformation Test ◽  
Main Spindle

scholarly journals The Compositions: Biodegradable Material – Synthetic Resins as Moulding Sands Binders

2016 ◽  
Vol 16 (4) ◽  
pp. 75-78
Author(s):  
K. Major-Gabryś ◽  
A. Grabarczyk ◽  
St.M. Dobosz
Keyword(s):  
Thermal Deformation ◽  
Room Temperature ◽  
Bending Strength ◽  
Deformation Curve ◽  
Biodegradable Material ◽  
Technological Properties ◽  
Foundry Industry ◽  
Environmental Requirements ◽  
New Challenges ◽  
The Impact

Abstract Growing emission requirements are forcing the foundry industry to seek new, more environmentally friendly solutions. One of the solutions may be the technologies of preparing moulding and core sands using organic biodegradable materials as binders. However, not only environmental requirements grow but also those related to the technological properties of moulding sand. Advancing automation and mechanization of the foundry industry brings new challenges related to the moulding sands. Low elasticity may cause defects during assembly of cores or moulds by the manipulators. The paper presents the study of flexibility in the room temperature according to new method and resistance to thermal deformation of self-hardening moulding sands with furfuryl resin, containing biodegradable material PCL. The task of the new additive is to reduce the moulding sands harmfulness to the environment and increase its flexibility in the room temperature. The impact of the additive and the effect of the amount of binder on the properties of mentioned moulding sands were analysed. Studies have shown that the use of 5% of PCL does not change the nature of the thermal deformation curve, improves the bending strength of tested moulding mixtures and increases their flexibility at room temperature.

Observations on Sustained Load Environmental Crack Growth of a Titanium 8Al-lM0-lV Alloy

CORROSION ◽  
1971 ◽  
Vol 27 (12) ◽  
pp. 525-530 ◽  
Author(s):  
R. J. BUCCUI ◽  
P C PARIS
Keyword(s):  
Fracture Mechanics ◽  
Crack Propagation ◽  
Crack Growth ◽  
Room Temperature ◽  
Crack Arrest ◽  
Sustained Load ◽  
Distilled Water ◽  
Time To Failure ◽  
Nacl Solution ◽  
Test Technique

Abstract Sustained load environmental cracking of a mill annealed titanium 8Al-1Mo-1V alloy was investigated by methods amenable to fracture mechanics. Two environments were considered: 3.5% NaCl solution and distilled water, both at room temperature. Varying amounts of crack propagation followed by subsequent crack arrest were detected at K levels considerably below an apparent KIscc (almost 2 to 1) that would be determined from a time to failure test technique. At crack arrest locations along the specimen surface, minute amounts of crack division were often observed under magnification.

scholarly journals Novel Technique for Spacecraft^|^apos;s Thermal Deformation Test Based on Transient Phenomena

2014 ◽  
Vol 12 (ists29) ◽  
pp. Pc_29-Pc_34
Author(s):  
Kosei ISHIMURA ◽  
Kenji MINESUGI ◽  
Taro KAWANO ◽  
Atsushi WADA ◽  
Kazunori SHOJI ◽  
...  
Keyword(s):  
Thermal Deformation ◽  
Transient Phenomena ◽  
Novel Technique ◽  
Deformation Test
Sign in / Sign up

Export Citation Format

Share Document