scholarly journals Age hardening and fatigue strength of Al-Zn alloys with high Zn concentration.

1998 ◽  
Vol 48 (2) ◽  
pp. 98-102
Author(s):  
Akira SAKAKIBARA ◽  
Teruto KANADANI ◽  
Norio HOSOKAWA ◽  
Tadashi TANIMOTO
Keyword(s):  
Fatigue Strength ◽  
Age Hardening ◽  
Zn Concentration ◽  
Zn Alloys

scholarly journals Effect of a small addition of Si on age-hardening and fatigue strength in Al-Zn alloys.

1997 ◽  
Vol 47 (12) ◽  
pp. 698-699
Author(s):  
Teruto KANADANI ◽  
Norio HOSOKAWA ◽  
Tadashi TANIMOTO ◽  
Akira SAKAKIBARA ◽  
Norihide NISHIDA
Keyword(s):  
Fatigue Strength ◽  
Small Addition ◽  
Age Hardening ◽  
Zn Alloys

Corrigendum to “Synchrotron tomographic quantification of the influence of Zn concentration on dendritic growth in Mg-Zn alloys” [Acta Mater. 156 (2018) 287–296]

2019 ◽  
Vol 165 ◽  
pp. 751-752
Author(s):  
A.B. Phillion ◽  
Sansan Shuai ◽  
Enyu Guo ◽  
Jiang Wang ◽  
Tao Jing ◽  
...  
Keyword(s):  
Dendritic Growth ◽  
Acta Mater ◽  
Zn Concentration ◽  
Zn Alloys

Fatigue Behavior of Age-Hardening Cu-6Ni-1.5Si Alloys with Different Grain Sizes

2021 ◽  
Vol 1016 ◽  
pp. 125-131
Author(s):  
Masahiro Goto ◽  
T. Yamamoto ◽  
S.Z. Han ◽  
J. Kitamura ◽  
J.H. Ahn ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Grain Size ◽  
Fatigue Strength ◽  
Solution Heat Treatment ◽  
Fatigue Behavior ◽  
Fatigue Tests ◽  
The Other ◽  
Age Hardening ◽  
Grain Sizes ◽  
Thermomechanical Processes

On the thermomechanical treatments of Cu-Ni-Si alloy, cold-rolling (CR) before solution heat treatment (SHT) is commonly conducted to eliminate defects in a casting slab. In addition, a rolling is applied to reduce/adjust the thickness of casting slab before SHT. In a heavily deformed microstructure by CR, on the other hand, grain growth during a heating in SHT is likely to occur as the result of recrystallization. In general, tensile strength and fatigue strength tend to decrease with an increase in the grain size. However, the effect of difference in grain sizes produced by with and without CR before SHT on the fatigue strength is unclear. In the present study, fatigue tests of Cu-6Ni-Si alloy smooth specimens with a grain fabricated through different thermomechanical processes were conducted. The fatigue behavior of Cu-Ni-Si alloy was discussed.

Characterization of Precipitation Evolution in a Zn-Added Al-Mg-Si-Cu Alloy during Artificial Aging at 170 °C

2018 ◽  
Vol 941 ◽  
pp. 961-966
Author(s):  
Shang Zhu ◽  
Zhi Hui Li ◽  
Li Zhen Yan ◽  
Xi Wu Li ◽  
Shu Hui Huang ◽  
...  
Keyword(s):  
Artificial Aging ◽  
Age Hardening ◽  
Peak Hardness ◽  
Aging Condition ◽  
Β Phase ◽  
Cu Alloy ◽  
Zn Concentration ◽  
The Matrix ◽  
Small Clusters

A Zn-added Al-Mg-Si-Cu alloy during aging at 170 °C up to 34 h exhibits an interesting age-hardening effect. Small clusters, enriched in Mg and Si, are present in the sample after 0.25 h aging. The β′′ phase is dominant with the peak hardness of 135 HV after aging of 8 h. A decrease in hardness of the alloy occurs with the aging time increasing to 34 h, due to the coarsening of β′′ phase. It is also found that the Cu-containing L phase co-exists with the β′′ phase at this aging condition. The quantitative solute concentrations of the matrix show that the formation of clusters is consistent with the slight lower contents of Mg, Si and Cu compared with the alloy chemical composition, and the present of β′′ and L phase is associated with the further partitioning of Mg, Si and Cu from the Al matrix into the precipitates. No Zn-rich clusters and precipitates are observed and the Zn concentration in matrix has no significant change during aging for up to 34 h. This result means that the major of Zn remains in the matrix as aging continues.

Effects of Grain Boundary on Age Hardening and Reversion in Al-Zn Alloys

1983 ◽  
Vol 77 (1) ◽  
pp. K49-K51 ◽  
Author(s):  
M. Ohta ◽  
A. Sakakibara ◽  
H. Yamada ◽  
M. Yamada ◽  
T. Kanadani
Keyword(s):  
Grain Boundary ◽  
Age Hardening ◽  
Zn Alloys

Fatigue Strength of Maraging Steel at Elevated Temperatures

2008 ◽  
Vol 385-387 ◽  
pp. 161-164 ◽  
Author(s):  
T. Iwamoto ◽  
Norio Kawagoishi ◽  
Nu Yan ◽  
Eiji Kondo ◽  
Kazuhiro Morino
Keyword(s):  
Elevated Temperature ◽  
Fatigue Strength ◽  
Maraging Steel ◽  
Fracture Mechanism ◽  
Elevated Temperatures ◽  
Surface Oxidation ◽  
Fatigue Tests ◽  
Age Hardening ◽  
Effect Of Temperature ◽  
Rotating Bending Fatigue

Rotating bending fatigue tests were carried out to investigate the effects of temperature on the fatigue strength and the fracture mechanism of an 18 % Ni maraging steel at room and elevated temperatures of 473K and 673K. Fatigue strength was higher at elevated temperatures than at room temperature, though static strength was decreased by softening at elevated temperature. There was no effect of temperature on crack morphology and fracture mechanism. On the other hand, during fatigue process at elevated temperature, the specimen was age-hardened and the specimen surface was oxide. That is, the increase in fatigue strength at elevated temperature was mainly caused by the increase in hardness due to age-hardening and suppression of a crack initiation due to surface oxidation.

Microsture and Properties of a Cu-Cr-Zr-Fe-Ti Alloy

2015 ◽  
Vol 723 ◽  
pp. 556-560
Author(s):  
Fu Xiang Huang
Keyword(s):  
Electron Microscopy ◽  
Electrical Conductivity ◽  
Transmission Electron Microscopy ◽  
Age Hardening ◽  
Peak Hardness ◽  
Ti Alloy ◽  
Hardening Behavior ◽  
Transmission Electron ◽  
Zn Alloys ◽  
Scanning Electron

The effect of 0.45 wt. % Fe and 0.2 wt. % Ti additions on the age hardening behavior of Cu-Cr-Zr-Zn alloys has been investigated with respect to hardness, electrical conductivity and microstructure. It was showed that the addition of Fe /Ti to Cu-Cr-Zr-Zn alloys enhance strength and hardness, but decrease the electrical conductivity, and increase the aging temperature and time for attaining peak hardness. The scanning electron microscope (SEM) and transmission electron microscopy (TEM) results showed that there are four types of phases in the alloy, Cu-matrix, Cr-rich, (Cu,Zr)-rich and (Fe,Ti)-rich phases.

The Fatigue Strength of AlZn Alloys Aged after Two-Step Quenching

1991 ◽  
Vol 124 (2) ◽  
pp. K97-K100 ◽  
Author(s):  
T. Kanadani ◽  
T. Matsushima ◽  
N. Hosokawa ◽  
T. Kaneeda ◽  
A. Sakakibara
Keyword(s):  
Fatigue Strength ◽  
Step Quenching ◽  
Zn Alloys
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