A surface-treated steel sheet for a battery container, including a steel sheet, an iron-nickel diffusion layer formed on the steel sheet, and a nickel layer formed on the iron-nickel diffusion layer (and constituting the outermost layer, wherein when the Fe intensity and the Ni intensity are continuously measured from the surface of the surface-treated steel sheet for a battery container along the depth direction with a high frequency glow discharge optical emission spectrometric analyzer, the thickness of the iron-nickel diffusion layer being the difference between the depth at which the Fe intensity exhibits a first predetermined value and the depth at which the Ni intensity exhibits a second predetermined value is 0.04 to 0.31 μm; and the total amount of the nickel contained in the iron-nickel diffusion layer and the nickel contained in the nickel layer is 4.4 g/m.sup.2 or more and less than 10.8 g/m.sup.2.

A composite material includes a metallic bottom flat element, a metallic top flat element, and an intermediate layer made of a thermosetting synthetic material and arranged between the bottom flat element and the top flat element. The intermediate layer includes three or more duromers, with at least one of the duromers being in a cured state and the other ones of the duromers being in an uncured state. The at least one of the duromers has a polymerization temperature between 50 and 100° C., with a second one of the other ones of the duromers having a polymerization temperature between 170 and 220° C. and a third one of the other ones of the duromers having a polymerization temperature between 230 and 260° C.

There is provided a hot-stamped body including: a steel base metal; and a metallic layer formed on a surface of the steel base metal, wherein the metallic layer includes: an interface layer that contains, in mass %, Al: 30.0 to 36.0%, has a thickness of 100 nm to 5 μm, and is located in an interface between the metallic layer and the steel base metal; and a principal layer that includes coexisting MgZn.sub.2 phases and insular FeAl.sub.2 phases, is located on the interface layer, and has a thickness of 3 μm to 40 μm.

A display device includes a display panel; a supporter disposed on a surface of the display panel; and an adhesive layer disposed between the supporter and the display panel, wherein the supporter includes metal layers spaced apart from each other; and a cushion layer surrounding the metal layers, the adhesive layer includes a first area overlapping the metal layers in a vertical direction to the display panel; and a second area not overlapping the metal layers in the vertical direction to the display panel, and a modulus of the second area of the adhesive layer is larger than a modulus of the first area of the adhesive layer.

The present invention provides a method for manufacturing a polymer film, the method comprising the steps of: drying a polymer precursor to form a precursor film; and curing the precursor film to form a polymer film, wherein the drying is performed such that the content of a solvent remaining in the precursor film after the drying is 30% or less.

A multi-material component joined by a high entropy alloy is provided, as well as methods of making a multi-material component by joining materials with high entropy alloys to reduce or eliminate liquid metal embrittlement (LME) cracks.

Disclosed is a multi-layer composite cold-rolled steel plate, provided with an upper surface layer, a lower surface layer and at least one interlayer between the upper surface layer and the lower surface layer in the thickness direction of the steel plate, wherein the phase proportion of austenite in the microstructure of the upper surface layer and the lower surface layer is ≥95%, and the at least one interlayer comprises at least one first interlayer, with the phase proportion of martensite in the microstructure of the first interlayer being ≥85%. In addition, further disclosed is a method for manufacturing the multi-layer composite cold-rolled steel plate above, the method comprising the steps of: (1) preparing billets for various layers and assembling the billets; (2) rolling; (3) acid pickling and cold-rolling; (4) annealing, involving: controlling the annealing temperature to be 830-890° C., then cooling to 700-800° C. at a rate of 3-15° C./s, and then water-cooling until the steel plate temperature is below 100° C.; and (5) acid pickling the steel plate and then heating same to 180-240° C. for tempering, with the tempering time being 200-600 s. The multi-layer composite cold-rolled steel plate of the present invention has the characteristics of a high strength, a high formability and resistance to delayed cracking.

Provided is a steel sheet comprising a sheet thickness center part and a first surface layer part and a second surface layer part respectively arranged at two sides of the sheet thickness center part, wherein the first surface layer part and second surface layer part respectively independently have thicknesses of more than 10 μm to 30% or less of the sheet thickness, the first surface layer part and second surface layer part have average Vickers hardnesses different from the average Vickers hardness of a sheet thickness ½ position, and a first hardness cumulative value at a region from a surface of the first surface layer part side to 30% of the sheet thickness is 1.05 times or more of a second hardness cumulative value at a region from a surface of the second surface layer part side to 30% of the sheet thickness.

This invention provides a roll-bonded laminate that is excellent in press workability and/or a roll-bonded laminate with improved performance and ease of handling at the time of production. More specifically, this invention relates to a roll-bonded laminate composed of a stainless steel layer and an aluminum alloy layer with the peel strength of 60 N/20 mm or higher, a roll-bonded laminate composed of a stainless steel layer and a pure aluminum layer with the peel strength of 160 N/20 mm or higher, and a roll-bonded laminate composed of a pure titanium or titanium alloy layer and an aluminum alloy layer with the peel strength of 40 N/20 mm or higher.

The present disclosure generally relates to systems and methods for composites, including short-fiber films and other composites. In certain aspects, composites comprising a plurality of aligned fibers are provided. The fibers may be substantially aligned, and may be present at relatively high densities within the composite. For example, the composite may include substantially aligned carbon fibers embedded within a thermoplastic substrate. The composites may be prepared, in some aspects, by dispersing fibers by neutralizing the electrostatic interactions between the fibers, for example using aqueous liquids containing the fibers that are able to neutralize the electrostatic interactions that typically occur between the fibers. The liquids may be applied to a substrate, and the fibers may be aligned using techniques such as shear flow and/or magnetism. Other aspects are generally directed to methods of using such composites, kits including such composites, or the like.