Strain Hardening

Gray, George T.; Pollock, Tresa M.

doi:10.1002/0470845856.ch19

Cited by 8 publications

(8 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The strain-rate sensitivity of the flow stress (m 0 ) of various RuAl alloys, determined at 77 K and RT, was also reported to be low (m 0 ¼ 0.0040 O 0.0097) [12,16]. The low strain-rate sensitivity (m 0 ) of the polycrystalline RuAl alloys is in good agreement with the reports on the high stress exponent (m) of RuAl single crystals because m represents the reciprocal value of m 0 (217 ¼ 1/0.0046) [18].…”

Section: Single-phase and Near Single-phase Alloyssupporting

confidence: 65%

“…Work-hardening behavior of RuAl was studied in different alloys and temperature ranges using compression tests [11,13,14,18,22]. Generally, it is similar to that in other B2-aluminides (e.g.…”

Section: Single-phase and Near Single-phase Alloysmentioning

confidence: 99%

“…Consequently, the flow stress, prior to failure, increases by a factor of w5 in RuAl [6], or even w7 in Ru 53 A 47 [6,11]. Reported values of the work-hardening rate (q) at RT for binary single-phase RuAl alloys are typically found to lie between 10 GPa and 13 GPa [11,13], although a lower value of 6 GPa was also reported [18]. With increasing temperature, q of RuAl significantly decreases until about 600 K, then increases up to w800 K exhibiting a maximum, and afterwards, it decreases again [13].…”

Section: Single-phase and Near Single-phase Alloysmentioning

confidence: 99%

See 2 more Smart Citations

RuAl and its alloys, Part II: Mechanical properties, environmental resistance and applications

2008

View full text Add to dashboard Cite

Section: Single-phase and Near Single-phase Alloyssupporting

confidence: 65%

Section: Single-phase and Near Single-phase Alloysmentioning

confidence: 99%

Section: Single-phase and Near Single-phase Alloysmentioning

confidence: 99%

See 1 more Smart Citation

RuAl and its alloys, Part II: Mechanical properties, environmental resistance and applications

2008

View full text Add to dashboard Cite

“…Theoretical approaches based on first principles were proposed [26,27] to replace the earlier empirical rules and to guide the search for disordered solid solutions.Here we propose a reverse design strategy, with the aim of finding ordered structures in HEAs. This is motivated by the fact that-in contrast to fully disordered alloys-the ordered counterparts usually work-harden faster showing an improvement in their mechanical properties [28,29]. The increased work-hardening rate of ordered alloys originates from a high storage rate of dislocations coupled with a general lack of dynamic recovery processes [29].…”

mentioning

confidence: 99%

Computationally-driven engineering of sublattice ordering in a hexagonal AlHfScTiZr high entropy alloy

Rogal

Bobrowski

Körmann

et al. 2017

Sci Rep

View full text Add to dashboard Cite

Multi-principle element alloys have enormous potential, but their exploration suffers from the tremendously large range of configurations. In the last decade such alloys have been designed with a focus on random solid solutions. Here we apply an experimentally verified, combined thermodynamic and first-principles design strategy to reverse the traditional approach and to generate a new type of hcp Al-Hf-Sc-Ti-Zr high entropy alloy with a hitherto unique structure. A phase diagram analysis narrows down the large compositional space to a well-defined set of candidates. First-principles calculations demonstrate the energetic preference of an ordered superstructure over the competing disordered solid solutions. The chief ingredient is the Al concentration, which can be tuned to achieve a D019 ordering on the hexagonal lattice. The computationally designed D019 superstructure is experimentally confirmed by transmission electron microscopy and X-ray studies. Our scheme enables the exploration of a new class of high entropy alloys.

show abstract

“…Gray and Pollock (2002) have assessed the work hardening of intermetallic alloys; Kocks and Mecking (2003) have reviewed the present position with regard to work hardening models in conventional metals. Several aspects of work hardening under monotonic loading might also be important for the fatigue performance of the material.…”

Section: Introductionmentioning

confidence: 99%

Role of vacancies in work hardening and fatigue of TiAl alloys

Appel

Herrmann

Fischer

et al. 2013

International Journal of Plasticity

View full text Add to dashboard Cite

The role of vacancies in work hardening and fatigue of TiAl alloys was investigated by mechanical testing and TEM examination of deformed samples. The evolution of the dislocation glide resistance during straining and after recovery was analyzed in terms of thermodynamic glide parameters. Strain path change tests with respect to temperature and recovery experiments were performed in order to characterize the thermal stability of the produced defect structures. The recovery of the deformation induced defect structure was observed by TEM in situ heating experiments. The recovery kinetics is described on the basis of a recently published simulation study of vacancy annihilation.

show abstract

Strain Hardening

Cited by 8 publications

References 52 publications

RuAl and its alloys, Part II: Mechanical properties, environmental resistance and applications

RuAl and its alloys, Part II: Mechanical properties, environmental resistance and applications

Computationally-driven engineering of sublattice ordering in a hexagonal AlHfScTiZr high entropy alloy

Role of vacancies in work hardening and fatigue of TiAl alloys

Contact Info

Product

Resources

About