Temat: fatigue fracture - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: High Cycle Fatigue Performance of Hollow-Extruded 6005A-T6 Aluminum Alloy Characterized by a Layered Microstructure
Autorzy:: Ma, Zhongwei
Ma, Lin
Xu, Bo
Dan, Chuchen
He, Zhaokun
Wang, Yue
Powiązania:: https://bibliotekanauki.pl/articles/354038.pdf
Data publikacji:: 2019
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: friction stir welding
hollow-extruded 6005A-T6 aluminum alloy
fatigue
fracture
microstructure
Opis:: Sound joint of hollow-extruded 6005A-T6 aluminum alloy was achieved by friction stir welding and its high cycle fatigue performance was mainly investigated. As a result, the joint fatigue limit reaches 128.1 MPa which is 55% of the joint tensile strength. The fatigue fracture mainly occurs at the boundary between the stir zone and thermo-mechanically affected zone due to the large difference in the grain size. This difference is caused by the layered microstructure of the base material. The shell pattern with parallel arcs is the typical morphology in the fracture surface and the distance between arcs is increased with the increase of stress level. The specimen with the fracture located in the stir zone possesses a relatively low fatigue life.
Źródło:: Archives of Metallurgy and Materials; 2019, 64, 1; 285-292
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Fatigue Behavior of MIG-Welded 7N01-T4 Aluminum Alloy with Different V-Groove Angles
Autorzy:: Ma, Zhongwei
Li, Qinghua
Ma, Lin
He, Zhaokun
Liang, Zhimin
Powiązania:: https://bibliotekanauki.pl/articles/351758.pdf
Data publikacji:: 2019
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: 7N01-T4 aluminum alloy
MIG welding
V-groove angle
fatigue
fracture
Opis:: 7N01-T4 aluminum alloy was welded by metal inert gas welding and the influence of V-groove angle on joint fatigue properties was investigated. The results indicate that the volume of fusion zone (FZ) and the grains in FZ become small when the groove angle decreases to 50° from 70°. Most pores distribute at the FZ edge and fewer pores are formed in the small angle joint. The fatigue crack mainly initiates at the transition region between the weld passes due to the pore concentration. The small angle contributes to increasing joint fatigue properties, especially at the low stress level. The fatigue strength of 50° joint is 103.06 MPa which is 15.3% higher than that of 70° joint.
Źródło:: Archives of Metallurgy and Materials; 2019, 64, 4; 1577-1584
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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