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

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

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.

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

Effects of a Small Addition of Cu or Ge on the Microstructure and Mechanical Property of an Al-Si Alloy

2006 ◽  
Vol 519-521 ◽  
pp. 425-430 ◽  
Author(s):  
Keiyu Nakagawa ◽  
Teruto Kanadani ◽  
Kenich Nakayama ◽  
Akira Sakakibara
Keyword(s):  
Mechanical Property ◽  
Tensile Strength ◽  
Fatigue Strength ◽  
Grain Boundary ◽  
Binary Alloy ◽  
Tensile Loading ◽  
Small Addition ◽  
Microstructure And Mechanical Property

In this study, we investigated the effects of a small addition of Cu (0.1%) or Ge (0.1%) on the microstructure and mechanical property of Al-Si alloys. The results are as follows. The size of precipitates in the Cu-added or Ge-added alloys is smaller than that in the binary alloy. The size of the precipitates at the grain boundary in the Cu-added or Ge-added alloys is larger than the size of the precipitates in the binary alloy. However, the number of the precipitates at the grain boundary in the Cu-added and Ge-added alloys is smaller than that in the binary alloy. It was found that a small addition of Cu or Ge has the effect of raising the fatigue strength under repeated tensile loading as well as the tensile strength.

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

scholarly journals Effects of small addition of magnesium on initial aging rate of Al-Zn alloys

1972 ◽  
Vol 22 (4) ◽  
pp. 286-294 ◽  
Author(s):  
Hisashi SUZUKI ◽  
Motohiro KANNO ◽  
Kazuyoshi FUKUNAGA
Keyword(s):  
Small Addition ◽  
Aging Rate ◽  
Zn Alloys
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