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Ultrafine grain structure features in spray-formed AZ31 magnesium alloy

Saravanan, M. / Sivaiah, B. / Srivastava, A.K. / Dhar, Ajay

Highlights • Spray forming of Mg alloy was carried out with different delivery tube orifice. • ∅2.25mm delivery tube orifice promoted the formation of ultrafine grains. • A significant refinement of grain size ∼1μm in ultrafine level was achieved. • The enhancement in mechanical strength of spray-formed Mg alloy was observed. • The fracture surface evidences mixed ductile and brittle fracture.

Abstract The ultrafine grain structure was developed in spray-formed AZ31 magnesium alloy by optimizing delivery tube orifice diameter. A significant refinement of grain size ∼1μm in ultrafine level was achieved by using 2.25mm delivery tube orifice diameter. The tensile strength value was increased from 145MPa of as-cast alloy to 250MPa of spray-formed alloy, registering an enhancement of ∼72%. On the other hand, elongation was increased from 6% to 13% using 2.25mm orifice, registering more than onefold increase in elongation. Also, hardness enhancement of ∼49% was observed in spray-formed AZ31 alloy compared to as-cast alloy. The fracture surface of spray-formed AZ31Mg alloy evidences the mixed type of ductile and brittle fracture.

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Ultrafine grain structure features in spray-formed AZ31 magnesium alloy

Saravanan, M. / Sivaiah, B. / Srivastava, A.K. / Dhar, Ajay

Highlights • Spray forming of Mg alloy was carried out with different delivery tube orifice. • ∅2.25mm delivery tube orifice promoted the formation of ultrafine grains. • A significant refinement of grain size ∼1μm in ultrafine level was achieved. • The enhancement in mechanical strength of spray-formed Mg alloy was observed. • The fracture surface evidences mixed ductile and brittle fracture.

Abstract The ultrafine grain structure was developed in spray-formed AZ31 magnesium alloy by optimizing delivery tube orifice diameter. A significant refinement of grain size ∼1μm in ultrafine level was achieved by using 2.25mm delivery tube orifice diameter. The tensile strength value was increased from 145MPa of as-cast alloy to 250MPa of spray-formed alloy, registering an enhancement of ∼72%. On the other hand, elongation was increased from 6% to 13% using 2.25mm orifice, registering more than onefold increase in elongation. Also, hardness enhancement of ∼49% was observed in spray-formed AZ31 alloy compared to as-cast alloy. The fracture surface of spray-formed AZ31Mg alloy evidences the mixed type of ductile and brittle fracture.

Ultrafine grain structure features in spray-formed AZ31 magnesium alloy

Saravanan, M. / Sivaiah, B. / Srivastava, A.K. / Dhar, Ajay

Highlights • Spray forming of Mg alloy was carried out with different delivery tube orifice. • ∅2.25mm delivery tube orifice promoted the formation of ultrafine grains. • A significant refinement of grain size ∼1μm in ultrafine level was achieved. • The enhancement in mechanical strength of spray-formed Mg alloy was observed. • The fracture surface evidences mixed ductile and brittle fracture.

Abstract The ultrafine grain structure was developed in spray-formed AZ31 magnesium alloy by optimizing delivery tube orifice diameter. A significant refinement of grain size ∼1μm in ultrafine level was achieved by using 2.25mm delivery tube orifice diameter. The tensile strength value was increased from 145MPa of as-cast alloy to 250MPa of spray-formed alloy, registering an enhancement of ∼72%. On the other hand, elongation was increased from 6% to 13% using 2.25mm orifice, registering more than onefold increase in elongation. Also, hardness enhancement of ∼49% was observed in spray-formed AZ31 alloy compared to as-cast alloy. The fracture surface of spray-formed AZ31Mg alloy evidences the mixed type of ductile and brittle fracture.

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Title:

Ultrafine grain structure features in spray-formed AZ31 magnesium alloy

Contributors:

Saravanan, M. (author) / Sivaiah, B. (author) / Srivastava, A.K. (author) / Dhar, Ajay (author)

Publication date:

2014-02-28

Size:

5 pages

ISSN:

DOI:

https://doi.org/10.1016/j.matdes.2014.02.064

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

English

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