Abstract
Corrosion fatigue tests were carried out on die-cast and extruded magnesium alloys AZ91D, AZ80, AMSO, and ZK60 In air, and NaCl-based and borate solutions. Nsol/Nair ratios (the relative fatigue life) were used for analysis of the corrosion fatigue behavior of Mg alloys in various environments, where Nsol and Nair, are the numbers of cycles to failure in the solution and in air, respectively. Extruded ZK60 alloy reveals very high fatigue and corrosion fatigue properties in comparison with other alloys. However, it has the lowest relative fatigue life (Nsol/Nair ∼ 10-3 - 10-2) or the highest sensitivity to the action of Nad-based solutions in comparison with that of AMSO and AZ31 alloys (Nsol/Nair, ∼ 10 -2 - 10-1). Under the same stress, the corrosion fatigue life of extruded alloys is significantly longer than that of die-cast alloys (Nsol for extruded AMSO in NaCl is two to three times longer than that of die-cast AMSO). The synergistic effect of corrosion and stress on viscoelasticity of magnesium alloys called corrosion creep is shown. The highest sensitivity to creep in a corrosive environment is observed in the alloy with the highest Al content.
| Original language | English |
|---|---|
| Pages (from-to) | 75-88 |
| Number of pages | 14 |
| Journal | Materials and Manufacturing Processes |
| Volume | 20 |
| Issue number | 1 |
| DOIs | |
| State | Published - 14 Feb 2005 |
Keywords
- 3.5 %NaCl- And borate buffer solutions
- Corrosion creep
- Corrosion fatigue
- Die casting
- Emulsion of NaCl solution in gear oil
- Extrusion
- Fitting equations
- Magnesium alloys
- Relative fatigue life
- Size effect
ASJC Scopus subject areas
- General Materials Science
- Mechanics of Materials
- Mechanical Engineering
- Industrial and Manufacturing Engineering