Dynamic Behavior of a Rare-Earth-Containing Mg Alloy, WE43B-T5, Plate with Comparison to Conventional Alloy, AM30-F

Agnew, Sean R.; Whittington, W.R.; Oppedal, A.L.; Kadiri, Haitham El; Shaeffer, Matthew; Ramesh, K.T.; Bhattacharyya, Jishnu J.; DeLorme, Rick; Davis, Bruce

doi:10.1007/s11837-013-0830-x

Cited by 39 publications

(20 citation statements)

References 41 publications

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“…2d). Similar textures were reported in the literature for extruded and rolled alloy conditions (Gharghouri et al, 1999;Muransky et al, 2009;Agnew et al, 2003Agnew et al, , 2014. However, the reflections observed during the transmission diffraction experiments varied according to the specimen grain orientation with respect to the incident X-ray/neutron beam.…”

Section: Methodssupporting

confidence: 83%

Development of a laboratory-based transmission diffraction technique forin situdeformation studies of Mg alloys

2015

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A laboratory‐based transmission X‐ray diffraction technique was developed to measure elastic lattice strains parallel to the loading direction during in situ tensile deformation. High‐quality transmission X‐ray diffraction data were acquired in a time frame suitable for in situ loading experiments by application of a polycapillary X‐ray optic with a conventional laboratory Cu X‐ray source. Based on the measurement of two standard reference materials [lanthanum hexaboride (NIST SRM 660b) and silicon (NIST SRM 640c)], precise instrumental alignment and calibration of the transmission diffraction geometry were realized. These results were also confirmed by the equivalent data acquired using the standard Bragg–Brentano measurement geometry. An empirical Caglioti function was employed to describe the instrumental broadening, while an axis of rotation correction was used to measure and correct the specimen displacement from the centre of the goniometer axis. For precise Bragg peak position and hkil intensity information, a line profile fitting methodology was implemented, with Pawley refinement used to measure the sample reference lattice spacings (do(hkil)). It is shown that the relatively large X‐ray probe size available (7 × 7 mm) provides a relatively straightforward approach for improving the grain statistics for the study of metal alloys, where grain sizes in excess of 1 µm can become problematic for synchrotron‐based measurements. This new laboratory‐based capability was applied to study the lattice strain evolution during the elastic–plastic transition in extruded and rolled magnesium alloys. A strain resolution of 2 × 10−4 at relatively low 2θ angles (20–65° 2θ) was achieved for the in situ tensile deformation studies. In situ measurement of the elastic lattice strain accommodation with applied stress in the magnesium alloys indicated the activation of dislocation slip and twin deformation mechanisms. Furthermore, measurement of the relative change in the intensity of 0002 and 103 was used to quantify {102}〈011〉 tensile twin onset and growth with applied load.

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Section: Methodssupporting

confidence: 83%

Development of a laboratory-based transmission diffraction technique forin situdeformation studies of Mg alloys

2015

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“…Some other researchers have also reported similar high mechanical anisotropy of AZ31B alloys [52,56]. In contrast, in rare-earth containing magnesium alloys, due to an initial weak texture that results from the texture randomizing effect of rare-earth elements, a low degree of mechanical anisotropy has been reported [57,58].…”

Section: Analysis Of Mechanical Behavior and Strain Hardeningmentioning

confidence: 83%

Experimental and simulation analysis of texture formation and deformation mechanism of rolled AZ31B magnesium alloy under dynamic loading

Asgari

Szpunar

Odeshi

et al. 2014

Materials Science and Engineering: A

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“…Recently, it has been noticed that Mg as well as Mg alloys tend to fail by ASB which is a mode of plastic instability for certain visco-plastic materials [52] [53,71]. Conventionally, two approaches have been employed to investigate the problem of ASBs.…”

Section: Discussionmentioning

confidence: 99%

“…Recently, adiabatic shear banding (ASB) has been identified as a common mode of plastic instability which leads to final failure of several Mg-alloys, particularly under dynamic loading [51][52][53]. A general theory based on the competition between work-hardening and thermalsoftening of the material concludes that ASB occurs when work-hardening is out-paced by thermal softening [54].…”

Section: Introductionmentioning

confidence: 99%

Effect of strain rate on the mechanical properties of magnesium alloy AMX602

Shen

Kondoh

Jones

et al. 2016

Materials Science and Engineering: A

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In the present work, the effect of strain rate on the mechanical properties, particularly the plastic deformation behavior of a magnesium alloy, AMX602 (Mg-6%Al-0.5%Mn-2%Ca; all wt.%), fabricated by powder metallurgy, has been investigated under both quasi-static (strain rate 1×10 -3 s -1 ) and dynamic (strain rate 4×10 3 s -1 ) compressive loading. The alloyed powder was extruded at three different temperatures. The microstructure of the alloy was examined by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). It was found that AMX602 exhibits an impressive mechanical behavior but with a slight anisotropy along different directions in both strength and compressive ductility (or malleability). The strength was found to be nearly independent of the extrusion temperature, particularly, under dynamic loading.Nanoindentation strain rate jump test reveals a strain rate sensitivity of ~0.018 to ~0.015, depending on the extrusion temperature. Sub-micrometer-scale particles of the intermetallic 2 compound Al 2 Ca were found with sizes ranging from ~100nm to ~1.0μm. These intermetallic particles are believed to have precipitated out during the extrusion process. They contribute to the formation of the ultrafine equiaxed grains which, in turn, help to improve the strength of the alloy by acting as barriers to dislocation motion. Adiabatic shear bands (ASBs) were observed in the dynamically loaded samples, the propagation of which eventually leads to final fracture of the specimens.

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Dynamic Behavior of a Rare-Earth-Containing Mg Alloy, WE43B-T5, Plate with Comparison to Conventional Alloy, AM30-F

Cited by 39 publications

References 41 publications

Development of a laboratory-based transmission diffraction technique forin situdeformation studies of Mg alloys

Development of a laboratory-based transmission diffraction technique forin situdeformation studies of Mg alloys

Experimental and simulation analysis of texture formation and deformation mechanism of rolled AZ31B magnesium alloy under dynamic loading

Effect of strain rate on the mechanical properties of magnesium alloy AMX602

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