Influence of grain size on Portevin-LeChatelier effect in Al-Mg alloys

精, 三浦; 英明, 山内

doi:10.2464/jilm.20.548

Cited by 8 publications

(3 citation statements)

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“…6(b)). It is reported that the stress amplitude decreases with decreasing amount of the solute Mg element 4) . As for the specimen B, the amount of T phase increases after arti cial aging at higher temperatures (Fig.…”

Section: 4mentioning

confidence: 99%

“…The serrated ow is caused by dynamic strain aging (DSA), where the solute atoms diffuse in the matrix and interact with dislocations in motion during deformation 1,2) . Brief analyses have been done to reveal a great deal about the DSA phenomena with an emphasis on the effects of solute concentration and process factors such as strain, strain rate, deformation temperature and so on [3][4][5][6][7] . As for the microstructural factors, it has been reported that nano-ordered clusters (or G.P.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Precipitation State on Serrated Flow in Al-Mg(-Zn) Alloys

et al. 2016

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The effects of the aging conditions on the serrated ow in Al-Mg(-Zn) alloys were investigated, focusing on the precipitation states. Al6%Mg and Al-6%Mg-3%Zn alloys were naturally and arti cially aged after solution treated and quenched. The serrated ow was examined by tensile test. As for the Al-6%Mg-3%Zn alloy, the naturally aged specimens show the increase in the critical strain for serrated ow. The Zn-Mg clusters are formed during natural aging. Furthermore, the increase in the number density and the size of these clusters corresponds to the increases in the critical strain, which reveals that the formation of these coherent clusters is one of the dominant factors for delaying the onset of serrated ow. On the other hand, as for the arti cially aged specimens in the under-aged conditions, the transformation of the clusters to the incoherent meta-stable precipitates brings about the decrease in the critical strain. Furthermore, the increase in the volume fraction of these precipitates in the over-aged conditions reduce the stress amplitude of serrated ow, which are brought about by the decrease in the solute Mg content.

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Section: 4mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of Precipitation State on Serrated Flow in Al-Mg(-Zn) Alloys

et al. 2016

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“…Investigation of the cause of serration generation in Al-Mg alloy using In-situ XRD/DIC simultaneous measurement Hiroki ADACHI 1 *, Tatsuya KITANO 2 , Masahiro HIRATA 2 and Daisuke OKAI 1 Type-B serrations were observed during room-temperature tensile deformation of Al-2.17mass%Mg alloy with an average grain size of 12 μm. Digital image correlation was used to visualize Portevin-Le Chatelier (PLC) bands, and microstructural changes in these bands were observed by in-situ X-ray diffraction measurements using synchrotron radiation at SPring-8.…”

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confidence: 99%