Mechanical properties and microstructural changes of ultrafine-grained AA6063T6 during high-cycle fatigue

2006 ◽  
Vol 97 (10) ◽  
pp. 1392-1400 ◽  
Author(s):  
Matthias Hockauf ◽  
Lothar W. Meyer ◽  
Thorsten Halle ◽  
Corinna Kuprin ◽  
Michael Hietschold ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
High Cycle Fatigue ◽  
Cycle Fatigue ◽  
Microstructural Changes ◽  
Ultrafine Grained

scholarly journals Mechanical Properties and Very High Cycle Fatigue Behavior of Peak-Aged AA7021 Alloy

Metals ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 1023 ◽  
Author(s):  
Byung-Hoon Lee ◽  
Sung-Woo Park ◽  
Soong-Keun Hyun ◽  
In-Sik Cho ◽  
Kyung-Taek Kim
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Tensile Strength ◽  
High Cycle Fatigue ◽  
Fatigue Behavior ◽  
Cycle Fatigue ◽  
Solution Treated ◽  
Very High Cycle Fatigue ◽  
Peak Aged ◽  
Very High

The effect of heat treatment condition on non-Cu AA7021 alloy was investigated with respect to mechanical properties and very high cycle fatigue behavior. With a focus on the influence of heat treatment, AA7021 alloy was solution heat-treated at 470 °C for 4 h and aged at 124 °C. Comparing the results of solution-treated and peak-aged AA7021 alloy shows a significant increase in Vickers hardness and tensile strength. The hardness of AA7021 alloy was increased by 65% after aging treatment, and both tensile strength and yield strength were increased by 50~80 MPa in each case. In particular, this paper investigated the very high cycle fatigue behavior of AA7021 alloy with the ultrasonic fatigue testing method using a resonance frequency of 20 kHz. The fatigue results showed that the stress amplitude of peak-aged AA7021 alloy was about 50 MPa higher than the solution-treated alloy at the same fatigue cycles. Furthermore, it was confirmed that the size of the crack initiation site was larger after peak aging than after solution treatment.

scholarly journals Low-and High-cycle Fatigue Properties of Ultrafine-grained Low Carbon Steels

2003 ◽  
Vol 89 (6) ◽  
pp. 726-733 ◽  
Author(s):  
Tatsuaki SAWAI ◽  
Saburo MATSUOKA ◽  
Kaneaki TSUZAKI
Keyword(s):  
High Cycle Fatigue ◽  
Carbon Steels ◽  
Fatigue Properties ◽  
Cycle Fatigue ◽  
Low Carbon ◽  
Low Carbon Steels ◽  
Ultrafine Grained

Blended Elemental P/M Synthesis of Titanium Alloys and Titanium Alloy-Based Particulate Composites

2007 ◽  
Vol 534-536 ◽  
pp. 777-780
Author(s):  
Masuo Hagiwara ◽  
Satoshi Emura
Keyword(s):  
Mechanical Properties ◽  
Titanium Alloy ◽  
Titanium Alloys ◽  
Alloy Powder ◽  
High Cycle Fatigue ◽  
Particulate Composites ◽  
Processing Conditions ◽  
Cycle Fatigue ◽  
Blended Elemental ◽  
Optimal Processing

Titanium alloys and Titanium alloy-based particulate composites were synthesized using the blended elemental P/M route. First, processing conditions such as the fabrication of master alloy powder were investigated. Ti-6Al-4V, Ti-5Al-2.5Fe, Ti-6Al-2Sn-4Zr-2Mo, IMI685, IMI829, Timetal 1100 and Timetal 62S, and Ti-6Al-2Sn-4Zr-2Mo/10%TiB and Timetal 62S/10%TiB were then synthesized using the optimal processing conditions obtained. The microstructures and mechanical properties such as tensile strength and high cycle fatigue strength were evaluated.

The Effect of Primary Axis and Low Angle Boundary Misorientation on CMSX-10K Mechanical Properties

2000 ◽  
Author(s):  
Yakin Patel ◽  
Paul F. Browning ◽  
Michael D. Fitzpatrick ◽  
Dean Schmiedechnekt ◽  
Allen Price ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Single Crystal ◽  
Gas Turbines ◽  
High Cycle Fatigue ◽  
High Efficiency ◽  
Stress Rupture ◽  
Fatigue Properties ◽  
Cycle Fatigue ◽  
Axis Orientation ◽  
Primary Axis

The U. S. Department of Energy’s Advanced Turbine Systems (ATS) program supports the development of high efficiency gas turbines for industrial and power generation applications. As part of this program, CMSX-10K, a third generation single crystal Ni-base superalloy, is being considered for use in turbine blade applications in an ATS engine. In support of the design and casting process development of CMSX-10K, assessment of component tolerance to casting defects was performed. Single crystal specimens with primary axis orientation between 4 and 26 degrees and bicrystal specimens with low angle boundaries (LABs) having between 0 and 18 degrees of misorientation were used. The effects of primary axis misorientation and LABs on critical mechanical properties were evaluated. Primary axis misorientation of greater than 15 degrees reduced tensile and high-cycle fatigue properties. Similarly, stress rupture properties were reduced for primary axis misorientation of greater than 20 degrees. LABs having greater than 10 degrees of misorientation caused significantly reduced stress rupture life. LABs having greater than 12 degrees of misorientation also resulted in reduced tensile and high-cycle fatigue properties.

Simulation and Experimental Mechanical Properties of SiCn/2024 Al Alloy Co-Continuous Composites

2013 ◽  
Vol 712-715 ◽  
pp. 997-1001 ◽  
Author(s):  
Yi Wei Qin ◽  
Sen Kai Lu
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
High Cycle Fatigue ◽  
Elasticity Modulus ◽  
Failure Strain ◽  
Simulated Data ◽  
Al Alloy ◽  
Cycle Fatigue ◽  
Simulation Code ◽  
Al Matrix

The experimental and numerical simulations of mechanical properties of co-continuous composites SiCn/Al produced by infiltration of SiC preforms with melted 2024 Al alloy using Solidwork2012 Simulation code were carried out. The results showed that ultimate tensile strengths of SiCn/Al up to 410 MPa at a failure strain of up to 0.7% without any heat treatment. The compression strength was up to 710 MPa with 2% strain to failure. The composites show an excellent resistance to high cycle fatigue. Fatigue life for specimen was 4.5×105cycles for 250 MPa while R=-1.0, and 4.9×105cycles for 164 MPa while R=-0.05. Simulated data shows there is different mechanical behavior between SiC structs and Al matrix, difference of elasticity modulus of two constituents occasion difference of generated deflection, Al has taken place large deformation; Due to structural characteristic of SiC, the force on each rib affects other adjacent rib, Al and SiC restrict each other to prevent from producing the strain.

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