1、AECMA STANDARD NORME AECMA AECMA NORM Edition approved for publication 15 May 2003 prEN 3979 Edition P 1 May 2003 Comments should be sent within six months after the date of publication to AECMA-STAN ICs: Descriptors: ENGLISH VERSION Aerospace series Aluminium alloy AL-P8090- 02 Sheet for superplast
2、ic forming (SPF) 0,8 mm 6 See EN 4400-2. 7 - Elongation ALO % 2 300 See EN 4400-2. 7 - p 2,56 kgIdm3 See EN 4400-2. Electrical conductivity See EN 4400-2. ieference heat treatment -I Delivery condition + 525 “C 535 “C I WQ 40 “C + 165 “C O 185 “C I20 h t 40 h Microstructure See EN 4400-2. One sample
3、 per batch unless agreement is reached between the manufacturer and purchaser that the “capability clause“ may apply. 4 6 - The sample shall be taken from a region of the tensile specimen tested at line 63 representing a level of strain to be agreed between manufacturer and purchaser. The sample sha
4、ll be examined in the un-etched condition. 7 I Cavitation acceptance levels shall be agreed between manufacturer and purchaser. 3ain size See EN 4400-2. One sample per batch unless agreement is reached between the manufacturer and purchaser that the “capability clause“ may apply. ixternal defects 3u
5、perplastic forming capability See EN 4400-2. - I Superplastic forming capability shall be assessed by an elevated temperature tensile test. 6 - Testing temperature: 520 “C 6% 540 “C - Soaking time: 15 min t 45 min. - Constant crosshead velocity: v = & x Lrt where: i&rt = Lo + 2R and strain rate, & 2
6、 6.104 8 Iensity 3atch uniformity 51 T6 Marking inspection See EN 4400-2. See EN 4400-2. a Na I 1 O ppm, Ca I 120 ppm. This heat treatment and specified minimum mechanical properties relate to release testing by the sheet manufacturer. The minimum mechanical properties may not necessarily be achieved in all parts of all superplastically formed components. Iimensional inspection Votes rypical use Superplastically formed components 100 See EN 4400-2. Qualification programme to be agreed between manufacturer and purchaser. Page 6 prEN 3979: 2003 - Product qualification
