1 edition of Small-crack effects in high-strength aluminium alloys found in the catalog.
Small-crack effects in high-strength aluminium alloys
by National Aeronautics and Space Administration, Langley Research Center in Hampton, Va
Written in English
|Statement||J.C. Newman ... [et al.].|
|Series||NASA reference publication -- 1309|
|Contributions||Newman, J. C.|
'Methodology for modelling the small crack fatigue behaviour of aluminium alloys' Bruzzi, MS,McHugh, PE () 'Methodology for modelling the small crack fatigue behaviour of aluminium alloys'. International Journal Of Fatigue, (). Fatigue properties of T aluminium alloy are investigated in the high cycle fatigue (HCF) and very high cycle fatigue (VHCF) regime. Endurance tests are performed with ultrasonic equipment at 20 kHz cycling frequency at load ratios of R = −1, R = and R = up to 10 10 cycles. Additional servo-hydraulic tests between 8 and 10 Hz at R = show no .
A Comparison of Long and Short Fatigue Crack Growth in a High Strength Aluminium Alloy R.K. Bolingbroke and J.E. King: Short Fatigue Cracks in Technical pm-Mo Alloys A. Fathulla, B. Weiss, and R. Stickler Fatigue Growth of Long and Short Cracks in a Powder Metallurgy Nickel Base Superalloy F. Soniak and L. Remy. Environmental. Influence of Microstructure in Partial-Slip Fretting Contacts Based Upon Two-Dimensional Crystal Plasticity Simulations C.-H. Goh D. L., and Neu, R. W. (J ). "Influence of Microstructure in Partial-Slip Fretting Contacts Based Upon Two-Dimensional Crystal Plasticity Simulations." grain size, titanium alloys, aluminium alloys Cited by: 7.
Get this from a library! Hydrogen transport and cracking in metals: proceedings of a conference held at the National Physical Laboratory, Teddington, UK, April [A Turnbull; Institute of Materials (Great Britain);]. Some Aspects of Small Crack Growth Near Threshold in Dual Phase Steel S. Kawachi K. Yamada T. Kunio Microstructural Variations in Short Fatigue Crack Propagation of a C-Mn Steel E. R. de los Rios A. Navarro K. Hussain Crack propagation: closure effects Stage I and Stage II Propagation of Short and Long Cracks in Al-Zn-Mg Alloys:
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High pressure die casting is an established process that produces high quality castings with close dimensional tolerances. This chapter covers the history of high pressure die casting from its humble beginnings in up to the present.
It also details the most common aluminium alloys, the defects that can occur and typical microstructures. High-strength or hard steels and also light metals such as Ti and Al alloys are expected to be used for the aerospace and automotive industry components having complex shapes which need special costly casting and welding processes if traditional manufacturing methods are applied.
The effect of notch geometry on the propagation of fatigue cracks emanating from sharp V-shaped notches was investigated. To this purpose, an experimental campaign has been conducted on Al machining".
Free-machining alloys are not intended for use where welding is required. Phosphorus - is generally considered to be an undesirable impurity in steels. It is normally found in amounts up to % in most carbon steels. In hardened steels, it may tend to cause embrittlement.
In low-alloy high-strength steels, phosphorus may be added. The majority of the fatigue life for high strength metallic aircraft structures is often spent in the small crack near threshold region.
Accurate modelling of this regime is therefore essential if we are to gain the maximum possible life from existing Cited by: higher fatigue strengths than aluminum alloys with MPa (70 ksi) yield strengths.
A com- a small crack, generally at some point on the external surface. The crack then propagates Fig. Fatigue crack growth in a high-strength steel part Chapter Fatigue / Environmental sensitivity of small crack growth in aluminium alloy Article in Fatigue & Fracture of Engineering Materials & Structures 8(4) - April with 44 Reads.
Small-crack effects in high-strength aluminum alloys [microform]: a NASA/CAE cooperative program / J.C. Constant amplitude and post-overload fatigue crack growth behavior in PM aluminum alloy AA [microfo. Aluminium and its alloys / by N.
Budgen TL turbine engine compressor housing refurbishment [microform]: plasma spray project / George W. Small-crack effects in high-strength aluminum alloys [microform]: a NASA/CAE cooperative program / J.C.
However, it is widely accepted that corrosion fatigue crack initiation points are due to surface defects (such as corrosion pits and voids) of aluminium alloys caused by NaCl aqueous solutions by previous literature.
10,27, 28 In addition, effects of second cracks of high‐strength aluminium alloy, ‐T and ‐T, as Cited by: Wu, X.R. et al () Small crack growth and fatigue life prediction for high-strength aluminium alloys: Part I; Fatigue and Fracture of Engineering Materials and Structu – CrossRef Google ScholarCited by: 1.
Small-crack effects in high-strength aluminum alloys [microform]: a NASA/CAE cooperative program  Hampton, Va.: National Aeronautics and Space Administration, Langley Research Center ; [Springfield, Va.: National Technical Information Service, distributor, ].
Abstract. The low cycle fatigue behavior of IMI alloy ocessed nealed microstructures was investigated. Material with large colony structure alphaplatelets oriented in the same direction, resulting from rk and slow cooling rate from ase region, exhibited lower fatigue strength than material with.
The macro-mesoscopic joint fatigue model containing hardening particles and crystal characteristics is established to study the effect of the hardening particles and the grain orientation on fatigue properties of an aluminum alloy friction stir welding (FSW) joint.
The macroscopic model is composed of the weld nugget zone, thermo-mechanically affected zone, Cited by: 1.
The corrosion fatigue crack growth characteristics of small surface and corner cracks in aluminum alloy is established. The damaging effect of salt water on the early stages of small crack growth is characterized by crack initiation at constituent particle pits, intergranular microcracking for a less than micrometers, and transgranular small crack growth for a micrometer.
As a result, fatigue small crack initiation and propagation behavior, and relative several central issues dealing with the effects of some factors (temperature, notch and pores etc.) on the fatigue cracking behaviors and life of cast magnesium alloys (including AZ91D, AZ91, AM60B, AM60 and AM50) were investigated by the different experimental Author: Xi-Shu Wang.
1 Fatigue life extension by crack repair using double stop-hole technique. The American Society for Testing and Materials defines fatigue life, N f, as the number of stress cycles of a specified character that a specimen sustains before failure of a specified nature occurs.
For some materials, notably steel and titanium, there is a theoretical value for stress amplitude below which the material will not fail for any number of cycles, called a fatigue limit.
Dahle AK, Arnberg L. Development of strength in solidifying aluminium alloys. Acta Mater ; – Crossref Google Scholar. Dahle AK, Lee YC, Nave MD, Schaffer PL, St John DH. Development of the as-cast microstructure in magnesium-aluminium alloys.
J Light Met ; 1: 61– Crossref Google Scholar. Dieter G, Bacon D. Mechanical Cited by: 8. dominated by initiation so pick small, high-strength microstructures Cracked specimen (Kt > 5) - in the absence of tensile residuals and for near conditions, large grain size preferred Notched Specimen (Kt ≈ 2) - at long lives initiation and crack growth equally important.
Avoid high tensile residuals therefore use lower strength materialsFile Size: KB. Effect of Stress Ratio on Short Fatigue Crack Growth C. H. Wang. C. H. Wang.
School of Engineering and Technology, Deakin University, Geelong, Vic Australia A Review of Modelling of Small-Crack Behaviour and Fatigue-Life Predictions for Aluminium Alloys,” Fatigue Fract.
Engng Mater. by: An accurate evaluation of stress corrosion cracking (SCC) in 13Cr martensitic stainless steel (MSS) is still missing due to the lack of an in-situ insight into the process evolution and full characterization of the corrosion morphology. In this work, two main regimes involved in the SCC progression, including localized corrosion and cracking, were comparatively studied using in Cited by: 1.This book is an English translation of the original Japanese, first published inbut with two brand new chapters on fatigue failure of steels and the effect of surface roughness on fatigue strength.
The first part of this book includes a concise explanation of metal fatigue.