Use of Electron Fractography to Diagnose Cracking in a 7075-T6 Aluminum Forging

2019 ◽  
Keyword(s):  
Electron Fractography ◽  
Aluminum Forging

ALUMINUM 6151

Alloy Digest ◽  
1958 ◽  
Vol 7 (7) ◽  
Keyword(s):  
Heat Treatment ◽  
Shear Strength ◽  
High Temperature ◽  
Physical Properties ◽  
Heat Treating ◽  
Age Hardening ◽  
Temperature Performance ◽  
Aluminum Company ◽  
Aluminum Forging ◽  
Hardening Heat Treatment

Abstract ALUMINUM 6151, formerly A51S Alloy, is an aluminum forging alloy combining good forgeability, strength, and resistance to corrosion. It responds to an age-hardening heat treatment. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and shear strength as well as fatigue. It also includes information on high temperature performance as well as forming, heat treating, machining, and joining. Filing Code: Al-67. Producer or source: Aluminum Company of America.

Finite Element Prediction of Temperature Variation of Material and Dies in Aluminum Forging

2020 ◽  
Vol 830 ◽  
pp. 93-100
Author(s):  
Jae Dong Yoo ◽  
Tae Min Hwang ◽  
Man Soo Joun
Keyword(s):  
Aluminum Alloy ◽  
Temperature Rise ◽  
High Speed ◽  
Room Temperature ◽  
High Strain ◽  
Cold Forging ◽  
Multi Stage ◽  
Aluminum Forging ◽  
The Right ◽  
Finite Element Prediction

Investigation into behaviors of aluminum alloy to be metal formed at the room temperature is conducted in this study. An index is used to evaluate the sensitivity of temperature, that is, index of relative normalized temperature rise to steel called normalized temperature rise index per steel which helps researchers to obtain some insight on new materials based on experiences of steel forging. An investigation to an aluminum alloy shows that the index is quite high, implying that temperature effect as well as rate-dependence effect on the forming processes of aluminum alloy at the room temperature cannot be neglected. Some details of thermomechanical predictions of a relatively high-speed automatic multi-stage forging process of a yoke with highly deformed region are given to reveal the importance of temperature and/or strain rate even in cold forging of aluminum alloy parts with high speed and high strain. All manuscripts must be in English, also the table and figure texts, otherwise we cannot publish your paper. Please keep a second copy of your manuscript in your office. When receiving the paper, we assume that the corresponding authors grant us the copyright to use the paper for the book or journal in question. Should authors use tables or figures from other Publications, they must ask the corresponding publishers to grant them the right to publish this material in their paper. Use italic for emphasizing a word or phrase. Do not use boldface typing or capital letters except for section headings (cf. remarks on section headings, below).

scholarly journals Prospect on aluminum forging technology in China

2013 ◽  
Vol 63 (10) ◽  
pp. 370-374
Author(s):  
Tadashi Aiura ◽  
Yoshiki Takebayashi ◽  
Takeo Sakurai
Keyword(s):  
Aluminum Forging

Failure Analysis of Steel Superheater Tube Fractured in a Boiler of a Power Plant

2011 ◽  
Vol 462-463 ◽  
pp. 467-471
Author(s):  
Zainul Huda
Keyword(s):  
Power Plant ◽  
Steam Temperature ◽  
Hardness Testing ◽  
Visual Examination ◽  
Creep Failure ◽  
Electron Fractography ◽  
Superheater Tube ◽  
Micro Cracks ◽  
Long Time

This paper presents a case study of ASME SA213 type-T22 alloy steel superheater tube that failed in a boiler of a power plant. The failed superheater tube was investigated by visual examination, metallography, optical microscopy, electron fractography, and hardness testing. Microscopic examinations revealed inclusion, pre-existing micro-cracks and cementite precipitates at the grain boundaries in the microstructure; which were thought to be one of the major causes of failure of the superheater tube. Another major cause failure of boiler type T-22 was found to be creep failure because the boiler had been under use for a long time (36573 hours) at high steam temperature of around 420 °C with 130 bar pressure. Finally, recommendations have been suggested to improve the material characteristics and properties of the superheater tube for application in boiler of the power plant.

Sign in / Sign up

Export Citation Format

Share Document