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首頁 » 測試解決方案 » 按材料分類的測試解決方案 » 金屬 » Tension » ASTM E8利用自動延伸計的金屬材料拉伸測試

ASTM E8利用自動延伸計的金屬材料拉伸測試

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Standard

  • ASTM E8
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ASTM E8 詳述了測定金屬產品的降服強度、降服點伸長、拉伸強度、伸長率和斷面收縮率的方法。它應用於金屬材料的產品包括:片料、板材、絲、桿、棒、管材等。對於每種試樣類型,標準規定了相應的幾何形狀和尺寸、特定的試樣夾持方法以保證測試成功執行。試樣截面最普通的類型是矩形和圓形。

對於測試矩形截面試樣,我們採用各種機械楔型側面作動夾具,包括有平面鋸齒形夾面的手動、氣動和液壓驅動夾具。在圓形式樣的情況下,我們建議根據試樣兩端的形狀使用V字鋸齒形或螺紋夾面。而測試細絲,我們通常採用氣動繩和紗夾具,它能沿著細絲長度方向適當分佈負載,防止試樣在夾持區域中斷裂。不正確的試樣製備經常會導致測試結果不準確。為了保證測試結果準確,必須仔細製備。

為了確保結果準確,我們的萬能材料測試機系列滿足或者超越ASTM E8的精度要求。Bluehill®軟體提供了簡易且精確執行拉伸測試的標準功能。對於更複雜的測試,要求在不同的點改變速率或要求特定的應力或應變率,我們建議採用Bluehill 3金屬應用模組。該模組可以依據ASTM E8標準計算降服點延伸以及上、下降服強度。

我們為金屬拉伸測試提供了範圍廣泛的延伸計解決方案。我們的延伸計滿足或者超越ASTM E8對精度的要求。在進行如降服強度對應的應變量測時,一般我們建議採用自動延伸計──AutoX 750。採用自動延伸計有助於降低操作者對測試結果的影響,保證得到精確的資料。其他的能滿足E8要求的延伸計為2630系列軸向夾持延伸計。非接觸引伸計,如自動影像延伸計(Automatic Video Extensometer, AVE)幫助我們測定斷裂時的延伸率,避免試樣破壞時能量的釋放對儀器帶來損傷。

在本文中我們所介紹的內容是E8中的一些要點,然而由於ASTM E8複雜、嚴格,我們建議您仔細查閱標準以完全瞭解其需求。

Automatic Contacting Extensometer - Model AutoX 750

The AutoX 750 is a high-resolution, long-travel automatic contacting extensometer. It can be mounted onto any electromechanical 3300, 5500, or 5900 table top and floor model systems, as well as LX, DX, HDX, and KN static hydraulic testing systems. It is well suited for applications involving plastics, metals, biomedical, composites, elastomers, and more. The AutoX has a maximum travel of 750 mm and accuracy of ± 1 µm.

  • Products
  • 8/15/2013
  • 1.4 MB

5900 Series Premier Testing Systems Brochure

5900 Universal Testing Systems are engineered for precision, built for durability, and offer the flexibility for changing requirements. They are designed with standard and optional features that increase testing efficiency and improve the testing experience for the operator. A wide range of models are available for testing capacities from < 100N up to 600kN.

  • Products
  • 6/1/2017
  • 2.8 MB

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