Journal of Japan Institute of Light Metals
Online ISSN : 1880-8018
Print ISSN : 0451-5994
ISSN-L : 0451-5994
Search
Advanced search
OR
Browse
Search
Volume 65, Issue 12
Displaying 1-3 of 3 articles from this issue
Show all abstracts
    • |<
    • <
    • 1
    • >
    • >|
RESEARCH ARTICLE
  • Effect of cast structure and forging conditions on upset forgeability of a flame-resistant magnesium alloys
    Tomomi Ito, Satoshi Yanagihara, Masafumi Noda, Hisashi Mori
    Article type: RESEARCH ARTICLE
    2015 Volume 65 Issue 12 Pages 611-616
    Published: December 30, 2015
    Released on J-STAGE: January 30, 2016
    DOIhttps://doi.org/10.2464/jilm.65.611
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    The effect of heat treatment and dynamic recrystallization (DRX) on the microstructure, mechanical properties and limited reduction in thickness of the as cast Mg–10Al–0.2Mn–1Ca mass% (AMX1001) alloy was investigated in this study. The Mg17Al12 phases and Al–Ca compounds appeared in the as cast alloy. The Mg17Al12 phase mostly dissolved into the Mg matrix, and Al2Ca compound dispersed discontinuously surrounding the grain boundaries. The area fraction of the compounds in the heat treatment material decreased from 16% to 4% with increasing annealing temperature after the optimized heat treatment at 490°C for 6 h. Tensile strength and elongation of 253 MPa and 8% respectively were observed after heat treatment DRX occurred during the hot upsetting test of heat treated AMX1001 alloy with Al2Ca compounds at the newly formed DRXed grain boundaries. With the decrease of compounds and increase of upsetting test temperature, the limited reduction in thickness of AMX1001 cast alloy reached 50%. Because of consider an alternate rephrasing as the dispersion of fine Al2Ca compound receiving the promotion of fine Al2Ca compound and introduction of shear deformation associated with the processing, the area fraction of the DRXed grains was increased.
    View full abstract
    Download PDF (5690K)
  • Effect of high-speed impact compression on natural aging and subsequent artificial aging of a 6061 aluminum alloy
    Tomo Ogura, Keitaro Horikawa, Yuki Kitani, Mami Mihara, Seongnyeong Ki ...
    Article type: RESEARCH ARTICLE
    2015 Volume 65 Issue 12 Pages 617-621
    Published: December 30, 2015
    Released on J-STAGE: January 30, 2016
    DOIhttps://doi.org/10.2464/jilm.65.617
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    The effect of high-speed impact compression on natural aging and subsequent artificial aging of a 6061 aluminum alloy was investigated using Micro-Vickers hardness test, differential scanning calorimetry (DSC) analysis and transmission electron microscopy (TEM). The suppression of natural age-hardening was clearly seen in the alloy with high-speed impact compression. TEM observation showed that fine β″ precipitates was formed during artificial aging even after high-speed impact compression and natural aging. Maximum hardness of the peak-aged alloys with high-speed compression was almost the same as that without natural aging, showing that negative effect of two step aging was almost overcome by high-speed impact compression.
    View full abstract
    Download PDF (2684K)
LECTURE
    • |<
    • <
    • 1
    • >
    • >|
feedback
 Top