'); For engineered steel pieces, manufacturers and engineers identify the direction of the grain flow to evaluating the … Subject: Re: Grain Direction. In such a sheet, the L direction is in the plane of the plate, and is the rolled direction (direction of longest grain axis), the LT direction is also in the plane of the sheet, perpendicular to the L direction. The direction in which all or most of the paper fibers are oriented in a sheet or web.Since the grain is produced on the forming wire of a papermaking machine in the direction of the web's travel through the machine, the grain direction is also called the machine direction.The direction perpendicular to the grain direction is the cross-grain direction. First, classically, since many metallic alloys have a very distinct grain structure and alignment, the grain structure is defined in 3 perpendicular directions: L (longitudinal), LT (long transverse) and ST (short transverse). If, for example, aluminium bends the wrong way in relation to the rolling direction, there is a risk of breakage on the metal. The axis dimension in the two other directions, LT and ST, is much shorter than the L direction. There are numerous technical papers on this subject that I believe would help you. Copyright © 1998-2020 engineering.com, Inc. All rights reserved.Unauthorized reproduction or linking forbidden without expressed written permission. One set was stretched to 3-5% in the 0°, 45°, and 90° angle with respect to the original rolling direction. A grain is a region where the atoms are aligned. Select the category, browse and download your favourite mod. For engineering and manufacturing organizations, the need for digital transformation of product development processes just became more urgent than ever so we wanted to share an eBook that will help you build a practical roadmap for your journey. The first letter designates the grain direction normal to the crack plane. In metals, atoms are arranged in a crystal structure (it is not just a mess of atoms, the atoms line up in rows). Mechanical properties are also used to help classify and identify material. Definition: Forging Flow Lines is a directional orientation of metal grains and any non-metallic inclusions that have been deformed due to forging. : Thanks for your help!!! Texture or grain direction must be taken into account for accurate predictions of material behavior and characteristics when forming/bending. Longitudinal "L" … Looking to make the design and manufacturing of your products more agile? document.write('') (adsbygoogle = window.adsbygoogle || []).push({}); © Copyright 2000 - 2020, by Engineers Edge, LLC All rights reserved. Imagine, you’ve got a piece of wood. In typical sheet or plate form, a thick billet of aluminum is squeezed or rolled through a machine that squishes the sheet out into whatever thickness desired. Posted BySteve on October 18, 2002 at 16:49:54: I am trying to explain grain direction and need a picture of L, LT & ST to define. All pumps (about 4 as far as i can remember) had the same structure. Close this window and log in. { The Forging Industry recognizes "L" sometimes described as "LG" or longitudinal, LT, long transverse and ST, short transverse grain directions. With rectangular forgings, there are three grain directions, which describe the possibilities. The material at the time had a distinc banded structure due to some structural inhomogenity. Although not as visible, grains in a piece of steel are like the wood grain in a piece of lumber. Grain flows are very common in aeolian settings as grain avalanches on the slip faces of sand dunes. The following article describes the evolution of grain size measurement and ASTM stardard E 112. Polycrystalline materials are solids comprised of a variety of differing crystallites, which are also commonly referred to as the grain of the metal. The software determines the smallest rectangle (bounding box) that aligns with the grain direction to fit the flat pattern. They changed to a better material and better controllable heat treatment and the prpblem was solved, without any dimensional changes. A metal’s strength is directly related to its grain size; reducing grain size is a common way to improve material strength which often has little to no effect on the material’s toughness. About 1% of these are material handling equipment parts, 1% are packaging bags, and 1% are water treatment chemicals. The L direction is the direction the aluminum sheet is rolled, therefore the grain axis is aligned with the longest axis of this ellipsoid. This effectively means that of that tiny weave of fabric you are going diagonally across the squares and making the fabric much more unstable. The changing of rolling directions can refine the grains. Am I correct in stating that for a rectanglar bar, L = Longitudinal or actual grain direction, ST = Short Transverse = Thickness and LT = width. The strength of the material is going to vary based on what plate direction (i.e. // --> In this white paper learn how a standards-based, systematic, and automated generative MDD/XIL workflow helps automotive engineers develop their production ECU Verification & Validation (V&V) suites early during software modeling, and reuse them throughout the overall systems engineering project. Consider a second coupon: cut so the load is in the LT direction, crack propagates in the L direction. The crystalline lattice structures form during the cooling of the …
Dec 082020
 

document.write(''); For engineered steel pieces, manufacturers and engineers identify the direction of the grain flow to evaluating the … Subject: Re: Grain Direction. In such a sheet, the L direction is in the plane of the plate, and is the rolled direction (direction of longest grain axis), the LT direction is also in the plane of the sheet, perpendicular to the L direction. The direction in which all or most of the paper fibers are oriented in a sheet or web.Since the grain is produced on the forming wire of a papermaking machine in the direction of the web's travel through the machine, the grain direction is also called the machine direction.The direction perpendicular to the grain direction is the cross-grain direction. First, classically, since many metallic alloys have a very distinct grain structure and alignment, the grain structure is defined in 3 perpendicular directions: L (longitudinal), LT (long transverse) and ST (short transverse). If, for example, aluminium bends the wrong way in relation to the rolling direction, there is a risk of breakage on the metal. The axis dimension in the two other directions, LT and ST, is much shorter than the L direction. There are numerous technical papers on this subject that I believe would help you. Copyright © 1998-2020 engineering.com, Inc. All rights reserved.Unauthorized reproduction or linking forbidden without expressed written permission. One set was stretched to 3-5% in the 0°, 45°, and 90° angle with respect to the original rolling direction. A grain is a region where the atoms are aligned. Select the category, browse and download your favourite mod. For engineering and manufacturing organizations, the need for digital transformation of product development processes just became more urgent than ever so we wanted to share an eBook that will help you build a practical roadmap for your journey. The first letter designates the grain direction normal to the crack plane. In metals, atoms are arranged in a crystal structure (it is not just a mess of atoms, the atoms line up in rows). Mechanical properties are also used to help classify and identify material. Definition: Forging Flow Lines is a directional orientation of metal grains and any non-metallic inclusions that have been deformed due to forging. : Thanks for your help!!! Texture or grain direction must be taken into account for accurate predictions of material behavior and characteristics when forming/bending. Longitudinal "L" … Looking to make the design and manufacturing of your products more agile? document.write('') (adsbygoogle = window.adsbygoogle || []).push({}); © Copyright 2000 - 2020, by Engineers Edge, LLC All rights reserved. Imagine, you’ve got a piece of wood. In typical sheet or plate form, a thick billet of aluminum is squeezed or rolled through a machine that squishes the sheet out into whatever thickness desired. Posted BySteve on October 18, 2002 at 16:49:54: I am trying to explain grain direction and need a picture of L, LT & ST to define. All pumps (about 4 as far as i can remember) had the same structure. Close this window and log in. { The Forging Industry recognizes "L" sometimes described as "LG" or longitudinal, LT, long transverse and ST, short transverse grain directions. With rectangular forgings, there are three grain directions, which describe the possibilities. The material at the time had a distinc banded structure due to some structural inhomogenity. Although not as visible, grains in a piece of steel are like the wood grain in a piece of lumber. Grain flows are very common in aeolian settings as grain avalanches on the slip faces of sand dunes. The following article describes the evolution of grain size measurement and ASTM stardard E 112. Polycrystalline materials are solids comprised of a variety of differing crystallites, which are also commonly referred to as the grain of the metal. The software determines the smallest rectangle (bounding box) that aligns with the grain direction to fit the flat pattern. They changed to a better material and better controllable heat treatment and the prpblem was solved, without any dimensional changes. A metal’s strength is directly related to its grain size; reducing grain size is a common way to improve material strength which often has little to no effect on the material’s toughness. About 1% of these are material handling equipment parts, 1% are packaging bags, and 1% are water treatment chemicals. The L direction is the direction the aluminum sheet is rolled, therefore the grain axis is aligned with the longest axis of this ellipsoid. This effectively means that of that tiny weave of fabric you are going diagonally across the squares and making the fabric much more unstable. The changing of rolling directions can refine the grains. Am I correct in stating that for a rectanglar bar, L = Longitudinal or actual grain direction, ST = Short Transverse = Thickness and LT = width. The strength of the material is going to vary based on what plate direction (i.e. // --> In this white paper learn how a standards-based, systematic, and automated generative MDD/XIL workflow helps automotive engineers develop their production ECU Verification & Validation (V&V) suites early during software modeling, and reuse them throughout the overall systems engineering project. Consider a second coupon: cut so the load is in the LT direction, crack propagates in the L direction. The crystalline lattice structures form during the cooling of the …

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