Enhanced fatigue resistance of a nickel-based hastelloy induced by a surface nanocrystallization and hardening process

Villegas, Juan; Shaw, Leon L.; Dai, Kun; Yuan, W.; Tian, Jiawan; Liaw, Peter K.; Klarstrom, D. L.

doi:10.1080/09500830500311705

Cited by 68 publications

(46 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For example, the 0.2% offset yield strength of a nickel-based alloy can increase 65% and 84% after 30 and 180 min SNH processing over CG samples, respectively, without losing obviously the ductil-ity [22]. The fatigue strength of a nickel-based Hastelloy C-2000 rises about 50% after SNH for 30 min [18]. Wear and friction properties of a low-carbon steel sheet can also be improved significantly after SMAT [1].…”

Section: Introductionmentioning

confidence: 80%

“…The improved properties are generally attributed to the refined structure, work-hardened region and residual stress in surface nano-crystallized graded materials, which should be induced by S 2 PD process [1,18,23]. What is the individual contribution of these factors motivated further experimental and numerical studies.…”

Section: Introductionmentioning

confidence: 99%

“…Surface severe plastic deformation (S 2 PD), as a representative technique, can fabricate effectively surface nano-crystallized graded materials, which consist of a graded layer (GL) with grain size varying from tens of nanometers to a few micrometers and a coarse grained (CG) substrate with grain size in tens of micrometers, such as copper [2], Al-alloy [3], Fe [4] and stainless steel [5,6]. Due to different fabricating methods [7], S 2 PD includes shot peening (SP) [8][9][10], air blast shot peening (ABSP) [11][12][13], sandblasting (SB) [14][15][16], surface nanocrystallization and hardening (SNH) [17][18][19][20], surface mechanical attrition treatment (SMAT) [1,5,21], particle impact processing (PIP) [11], etc. The fundamental procedure of S 2 PD is to impact repeatedly the surface of CG materials with balls.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The main factor influencing the tensile properties of surface nano-crystallized graded materials

Chen

et al. 2010

Materials Science and Engineering: A

View full text Add to dashboard Cite

a b s t r a c tThe improved mechanical properties of surface nano-crystallized graded materials produced by surface severe plastic deformation (S 2 PD) are generally owing to the effects of the refined structure, workhardened region and compressive residual stress. However, during the S 2 PD process, residual stress is produced simultaneously with work-hardened region, the individual contribution of these two factors to the improved mechanical properties remains unclear. Numerical simulations are carried out in order to answer this question. It is found that work hardening predominates in improving the yield strength and the ultimate tensile strength of the surface nano-crystallized graded materials, while the influence of the residual stress mainly emerges at the initial stage of deformation and decreases the apparent elastic modulus of the surface nano-crystallized graded materials, which agrees well with the experimental results.

show abstract

Section: Introductionmentioning

confidence: 80%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The main factor influencing the tensile properties of surface nano-crystallized graded materials

Chen

et al. 2010

Materials Science and Engineering: A

View full text Add to dashboard Cite

show abstract

“…Specifically, gradient microstructures generated through surface mechanical attrition treatments or SMAT have additional benefits over other hierarchical microstructures from a surface science/tribological standpoint by concentrating the nanocrystalline properties in the surface region. For instance, nanostructured surface layers have shown improved corrosion resistance [6][7][8][9], wear [10,11] and fatigue [12][13][14], and irradiation resistance [15].…”

Section: Open Accessmentioning

confidence: 99%

Mechanical Behavior of Ultrafine Gradient Grain Structures Produced via Ambient and Cryogenic Surface Mechanical Attrition Treatment in Iron

Murdoch

Darling

Roberts

et al. 2015

Metals

View full text Add to dashboard Cite

Ambient and cryogenic surface mechanical attrition treatments (SMAT) are applied to bcc iron plate. Both processes result in significant surface grain refinement down to the ultrafine-grained regime; the cryogenic treatment results in a 45% greater grain size reduction. However, the refined region is shallower in the cryogenic SMAT process. The tensile ductility of the grain size gradient remains low (<10%), in line with the expected behavior of the refined surface grains. Good tensile ductility in a grain size gradient requires the continuation of the gradient into an undeformed region.

show abstract

“…The generation of dislocations, twinning, and development of grain boundaries with high angle misorientation are considered as the mainly reasons. The above techniques have been shown to improve the tensile strength [4], hardness [8,14], residual stress [4,8,14], wear resistance [8,13,14], and especially fatigue properties [8,[15][16][17] of materials.…”

Section: Introductionmentioning

confidence: 99%

Effect of Ultrasonic Surface Impact on the Fatigue Behavior of Ti-6Al-4V Subject to Simulated Body Fluid

Cao

Wang

et al. 2017

Metals

View full text Add to dashboard Cite

Abstract:The effect of ultrasonic nanocrystal surface modification (UNSM) on the fatigue behavior of Ti6Al4V (TC4) in simulated body fluid (SBF) was investigated. UNSM with the condition of a static load of 25 N, vibration amplitude of 30 µm and 36,000 strikes per unit produced about 35 µm surface severe plastic deformation (SPD) layers on the TC4 specimens. One group was treated with a hybrid surface treatment (UNSM + TiN film). UNSM technique improves the micro hardness and the compressive residual stress. The surface roughness is increased slightly, but it can be remarkably improved by the TiN film. The fatigue strength of TC4 is improved by about 7.9% after UNSM. Though the current density of corrosion is increased and the pitting corrosion is accelerated, UNSM still improved the fatigue strength of TC4 after pre-soaking in SBF by 10.8%. Interior cracks initiate at the deformed carbide and oxide inclusions due to the ultrasonic impacts of UNSM. Corrosion products are always observed at the edge of fracture surface to both interior cracks and surface cracks. Coating a TiN film on the UNSMed surface helps to improve the whole properties of TC4 further.

show abstract

Enhanced fatigue resistance of a nickel-based hastelloy induced by a surface nanocrystallization and hardening process

Cited by 68 publications

References 22 publications

The main factor influencing the tensile properties of surface nano-crystallized graded materials

The main factor influencing the tensile properties of surface nano-crystallized graded materials

Mechanical Behavior of Ultrafine Gradient Grain Structures Produced via Ambient and Cryogenic Surface Mechanical Attrition Treatment in Iron

Effect of Ultrasonic Surface Impact on the Fatigue Behavior of Ti-6Al-4V Subject to Simulated Body Fluid

Contact Info

Product

Resources

About