|
terryewnert
| Založen: 09. 04. 2025 |
| Příspěvky: 11 |
|
|
|
| Zaslal: 23.4.2025 11:45 |
|
|
 |
|
A research team at Pohang University of Science and Technology (POSTECH) has developed a novel alloy that maintains both strength and ductility across an exceptionally wide temperature range—from –196 °C to 600 °C. The study, published in Materials Research Letters, is drawing significant interest from industries such as aerospace and automotive, where materials must withstand extreme and rapidly changing temperatures.
Led by Professor Hyoung Seop Kim from POSTECH’s Department of Materials Science and Engineering, Graduate Institute of Ferrous Technology, and Department of Mechanical Engineering, the team introduced the concept of a "Hyperadaptor"—a material capable of consistent performance regardless of temperature.
The new alloy is a nickel-based high-entropy alloy (HEA) designed to deliver nearly constant mechanical behavior from cryogenic conditions to high heat. Its stability is due to nanoscale L1₂ precipitates, which are evenly distributed throughout the alloy. These tiny particles reinforce the material by limiting deformation, while the internal structure accommodates stress through uniform slip behavior across the temperature spectrum.
https://www.kumander.org/viewtopic.php?t=172
https://www.kumander.org/viewtopic.php?t=173
https://www.kumander.org/viewtopic.php?t=174
https://www.kumander.org/viewtopic.php?t=175
https://www.kumander.org/viewtopic.php?t=176
https://www.kumander.org/viewtopic.php?t=177
https://www.kumander.org/viewtopic.php?t=178
https://www.kumander.org/viewtopic.php?t=179
https://www.kumander.org/viewtopic.php?t=180
https://www.kumander.org/viewtopic.php?t=181
https://www.kumander.org/viewtopic.php?t=182
https://www.kumander.org/viewtopic.php?t=183
https://www.kumander.org/viewtopic.php?t=184
https://www.kumander.org/viewtopic.php?t=185
https://www.kumander.org/viewtopic.php?t=186
https://www.kumander.org/viewtopic.php?t=187
https://www.kumander.org/viewtopic.php?t=188
https://www.kumander.org/viewtopic.php?t=189
https://www.kumander.org/viewtopic.php?t=190
https://www.kumander.org/viewtopic.php?t=191
https://www.kumander.org/viewtopic.php?t=192
https://www.kumander.org/viewtopic.php?t=193
https://www.kumander.org/viewtopic.php?t=194
https://www.kumander.org/viewtopic.php?t=195
https://www.kumander.org/viewtopic.php?t=196
https://www.kumander.org/viewtopic.php?t=197
https://www.kumander.org/viewtopic.php?t=198
https://www.kumander.org/viewtopic.php?t=199
https://www.kumander.org/viewtopic.php?t=200
https://www.kumander.org/viewtopic.php?t=201
https://www.kumander.org/viewtopic.php?t=202
https://www.kumander.org/viewtopic.php?t=203
https://www.kumander.org/viewtopic.php?t=204
https://www.kumander.org/viewtopic.php?t=205
https://www.kumander.org/viewtopic.php?t=206
https://www.kumander.org/viewtopic.php?t=207
https://www.kumander.org/viewtopic.php?t=208
https://www.kumander.org/viewtopic.php?t=209
https://www.kumander.org/viewtopic.php?t=210
https://www.kumander.org/viewtopic.php?t=211
https://www.kumander.org/viewtopic.php?t=212
https://www.kumander.org/viewtopic.php?t=213
https://www.kumander.org/viewtopic.php?t=214
https://www.kumander.org/viewtopic.php?t=215
https://www.kumander.org/viewtopic.php?t=216
https://www.kumander.org/viewtopic.php?t=217
https://www.kumander.org/viewtopic.php?t=218
https://www.kumander.org/viewtopic.php?t=219
https://www.kumander.org/viewtopic.php?t=220
https://www.kumander.org/viewtopic.php?t=221
https://www.kumander.org/viewtopic.php?t=222
https://www.kumander.org/viewtopic.php?t=223
https://www.kumander.org/viewtopic.php?t=224
https://www.kumander.org/viewtopic.php?t=225
https://www.kumander.org/viewtopic.php?t=226
https://www.kumander.org/viewtopic.php?t=227
https://www.kumander.org/viewtopic.php?t=228
https://www.kumander.org/viewtopic.php?t=229
https://www.kumander.org/viewtopic.php?t=230
https://www.kumander.org/viewtopic.php?t=231
https://www.kumander.org/viewtopic.php?t=232
https://www.kumander.org/viewtopic.php?t=233
https://www.kumander.org/viewtopic.php?t=234
https://www.kumander.org/viewtopic.php?t=235
Typical metals used in daily applications are affected by temperature shifts—metal doorknobs, for example, feel freezing in winter and hot in summer. Most metal components are engineered to perform well within narrow temperature ranges, which can be a limitation in environments that experience dramatic temperature swings.
This new HEA overcomes that limitation, offering a promising solution for components used in harsh environments such as jet and rocket engines, power plant turbines, automotive exhaust systems, and pipelines. In these applications, the ability to remain stable under rapid or extreme thermal changes can significantly improve safety, reliability, and efficiency.
Professor Kim highlighted the importance of the discovery, stating, “Our HEA breaks through the limitations of existing alloys and establishes a new class of temperature-insensitive materials. The Hyperadaptor concept represents a breakthrough in developing next-generation materials that perform consistently under extreme conditions.”
The breakthrough paves the way for more robust engineering solutions where traditional metals would fail or require complex temperature management systems.
|
|
